Costochondritis
Clinical Snapshot
Costochondritis is inflammation of the costochondral junctions (where a rib's cartilage meets the rib itself) or the costosternal junctions (where that cartilage meets the sternum), most often affecting the 2nd through 5th costochondral/costosternal junctions and usually involving more than one site, without visible swelling.[1][2] It is a genuinely common presenting complaint: it accounts for roughly 6-13% of chest pain presentations in primary care and 13-36% of acute chest pain presentations overall depending on the care setting, and represents 20-50% of all chest-wall-pain diagnoses specifically.[1][3] In adolescents presenting with chest pain, a musculoskeletal cause is found in about 31% of cases, with costochondritis itself accounting for roughly 13-14%.[1][3]
This chapter is deliberately a companion to the separate Undifferentiated Chest Pain chapter, not a restatement of it. That chapter owns the single, universal, conservative red-flag screen every chest pain encounter needs before anything else — the "call 911 now" decision. This chapter begins only once that screen has been applied and cleared, and covers what happens next for the specific, common, benign diagnosis reached at the end of it: recognizing the classic reproducible-tenderness pattern, understanding Tietze syndrome as a distinct but related entity, and managing a condition whose entire evidence base for treatment remains genuinely limited.[1]
The single most important safety point in this chapter, restated throughout: reproducible tenderness on palpation of the chest wall is a reassuring finding, but it does not, by itself, rule out a cardiac cause — particularly in a patient with cardiac risk factors. Costochondritis is a diagnosis of exclusion, not a diagnosis made purely from a positive palpation finding.[3][1]
Recognize the Condition
The classic pattern
The hallmark, and the single most useful diagnostic feature, is reproducible pain on direct palpation of the affected costochondral or costosternal junction(s) — pressing on the exact spot recreates the patient's presenting pain.[3][1] The pain itself is typically sharp, aching, or pressure-like, most often bilateral or multifocal across several adjacent junctions rather than a single point, and is characteristically worsened by deep breathing, coughing, stretching, or upper body/arm movement.[1] Two additional bedside maneuvers can help reproduce the pain: the crowing rooster maneuver (extending the neck while pulling both arms posteriorly and superiorly) and crossed-chest adduction (adducting the arm across the chest while rotating the neck to the same side).[1] Onset is usually gradual, and a preceding antecedent illness with coughing, or recent unaccustomed or strenuous upper-body exercise, is common in the history.[3]
Tietze syndrome — related, but a distinct entity
Tietze syndrome is frequently confused with costochondritis, but the two are genuinely different on exam and, to some degree, in who gets them. The defining difference is visible, palpable swelling: Tietze syndrome produces firm, sometimes warm, tender swelling localized to a single costochondral junction (most often the 2nd or 3rd rib), whereas costochondritis, by definition, involves no swelling and more often affects multiple junctions.[1] Tietze syndrome also tends to have a more sudden onset (sometimes following an infection or minor trauma), can occur at any age but is most common under 40, and can show mild elevation of inflammatory markers (ESR/CRP) on testing — findings that are typically normal in isolated costochondritis.[1] In practice, the distinction changes the differential to consider (any new or enlarging chest wall swelling deserves its own evaluation — see Red Flags & Refer) more than it changes first-line conservative management, which is similar for both.
Other conditions on the musculoskeletal chest-pain differential
- Slipping rib syndrome — hypermobility of an anterior rib tip (most often the 8th-10th, "false" ribs) that catches or slips beneath the rib above, producing a sharp, sometimes clicking or popping pain reproduced by a specific "hooking" maneuver (hooking fingers under the costal margin and pulling anteriorly) rather than direct costochondral palpation.[3]
- Muscle strain — a clear history of recent lifting, forceful coughing, or unaccustomed exertion, with tenderness over muscle bellies (pectoralis, intercostals) rather than specifically at the costochondral junction.[3]
- Fibromyalgia — chest wall tenderness can be one component of a much more widespread, diffuse pain syndrome; see the dedicated Fibromyalgia chapter if the pattern extends well beyond the anterior chest wall.[1]
- Herpes zoster (pre-eruptive phase) — dermatomal, unilateral, band-like pain that precedes the characteristic vesicular rash by 1-5 days; reconsider if a rash develops in the following days.[3]
Risk Factors
- Most cases are idiopathic — no specific trigger is ever identified.[2]
- An antecedent respiratory illness with a prominent cough, which repeatedly strains the costochondral junctions.[3]
- Recent unaccustomed, repetitive, or strenuous upper-body exercise or activity (vigorous upper-extremity use, heavy lifting, rowing-type motions).[2][3]
- Direct chest wall trauma.[2]
- Peak incidence age 40-50 years, with a slight female predominance — Tietze syndrome, by contrast, occurs more often under age 40.[1]
- An underlying seronegative spondyloarthropathy or other rheumatologic disorder.[2]
- A history of breast cancer or other thoracic malignancy, or a thoracic tumour directly involving a costochondral junction — uncommon, but part of the reason new or progressive local swelling deserves its own workup rather than being assumed benign.[2]
- Intravenous drug use, immunocompromise, or a recent sternotomy/thoracic surgical or central-line procedure — specific risk factors for the rare but genuinely serious infectious (septic) costochondritis, discussed further in Red Flags & Refer.[2]
Red Flags & Refer
Costochondritis is a diagnosis of exclusion. Reproducible tenderness on chest wall palpation is a genuinely reassuring finding, but it is not, by itself, sufficient to rule out a cardiac or other serious cause — apply the universal red-flag screen in the Undifferentiated Chest Pain chapter to every chest pain encounter first, regardless of how classic the palpation finding looks. Escalate per that chapter, rather than reassuring as costochondritis, for any of the following:
- Any red flag from the Undifferentiated Chest Pain chapter's universal screen — radiation to the jaw/arm/neck/back, diaphoresis, hemodynamic instability, pleuritic pain with dyspnea, sudden severe tearing pain, syncope, or a pain pattern that is new, changed, or not previously formally investigated.
- Cardiac risk factors in the patient's history — reproducible chest wall tenderness does not exclude concurrent coronary disease: 6% of emergency department patients whose pain was reproduced by chest wall palpation were nonetheless also diagnosed with a myocardial infarction in one series, and a separate series found chest wall tenderness in 12% of ED patients with a concurrent acute MI.[3][1] Patients older than 35, those with a history of or risk factors for coronary artery disease, and anyone with cardiopulmonary symptoms (dyspnea, palpitations, diaphoresis) alongside the chest wall pain need an ECG at minimum, and possibly a chest radiograph, before the diagnosis is accepted as costochondritis.[3]
- Fever, warmth, erythema, or fluctuance at the site, especially in a patient who injects drugs, is immunocompromised, or has had recent thoracic surgery or a sternal/central-line procedure — this combination raises concern for infectious (septic) costochondritis, a genuinely different and more serious diagnosis needing imaging, culture, and antimicrobial management rather than reassurance and NSAIDs.[2]
- New, rapidly enlarging, or firm/fixed swelling at a costochondral junction, particularly with constitutional symptoms (unexplained weight loss, night sweats, a history of breast or other thoracic malignancy) — reconsider a thoracic tumour or other structural cause rather than assuming Tietze syndrome.[2]
- Pain that does not improve, or that worsens, despite an adequate trial of conservative treatment (see Treatment Failure / Next Step) — re-evaluate the diagnosis rather than simply extending or escalating the same self-care approach indefinitely.
Assessment & Diagnosis
A clinical diagnosis of exclusion
There is no laboratory or imaging test that confirms costochondritis — the diagnosis rests on history and examination, made only after more serious causes have been reasonably excluded per the Undifferentiated Chest Pain chapter's screen and the red flags above.[3][1] Examination should include palpation of each costochondral and costosternal junction to confirm reproducible tenderness, inspection specifically for swelling (favouring Tietze syndrome or an alternative diagnosis if present), auscultation of the heart and lungs, and assessment of the cervical spine and shoulder, since pain referred from either can mimic a chest wall origin.[3]
A clinical prediction rule — a teaching aid, not a stand-alone test
One evidence-graded rule combines several history and exam features into a point score; a score of 6 or more is reported as 93% specific for costochondritis.[1]
| Finding | Points |
|---|---|
| Pain reproduced by palpation | 2 |
| No history of coronary artery disease | 1 |
| Absence of physician concern for a serious cause | 1 |
| Pain that is non-retrosternal and non-oppressive in character | 1 |
| Well-localized pain | 1 |
| Stabbing pain quality | 1 |
Given its high specificity but the platform's calculator-safety guardrail (this rule's design does not meet the bar for a live interactive calculator — see ClinicalGuidelineHtml), this table is provided as a structured teaching aid for organizing the history and exam, not as a stand-alone diagnostic test in place of the red-flag screen and clinical judgment above.[1]
When to order an ECG or imaging
Patients older than 35 years, anyone with a personal history of or risk factors for coronary artery disease, and anyone with cardiopulmonary symptoms accompanying the chest pain should have a 12-lead ECG at minimum, and a chest radiograph should be considered, before the pain is attributed to costochondritis.[3] Imaging (radiograph, ultrasound, or cross-sectional imaging) otherwise adds little in a straightforward, reproducible, multifocal presentation without red flags — it is typically normal in true costochondritis, and its main role is excluding an alternative diagnosis (infection, mass, rib fracture) when the presentation is atypical, when swelling is present, or when a red flag from the previous section is identified.[2]
Differential diagnosis at a glance
| Category | Distinguishing features |
|---|---|
| Cardiac / vascular (ACS, pericarditis, aortic dissection) | See the Undifferentiated Chest Pain and Acute Coronary Syndromes chapters — radiation, diaphoresis, hemodynamic change, positional pericardial pain, or sudden tearing pain are not features of costochondritis. |
| Tietze syndrome | Visible/palpable swelling at a single junction (usually 2nd-3rd rib); costochondritis has no swelling and is more often multifocal.[1] |
| Slipping rib syndrome | Pain reproduced by the hooking maneuver at the costal margin (8th-10th ribs), not by direct costochondral palpation; may have an associated clicking sensation.[3] |
| Muscle strain | Recent exertion/lifting/forceful coughing; tenderness over the muscle belly rather than the costochondral junction itself.[3] |
| Infectious (septic) costochondritis | Fever, warmth, erythema, or fluctuance at the site; occurs disproportionately in IV drug use, immunocompromise, or post-sternotomy patients — see Red Flags & Refer.[2] |
| Herpes zoster (pre-eruptive) | Unilateral, dermatomal, band-like pain preceding a vesicular rash by 1-5 days.[3] |
| Fibromyalgia | Chest wall tenderness as one part of a much more diffuse, widespread pain pattern — see the Fibromyalgia chapter. |
Treatment Targets
- Confirm the diagnosis safely as one of exclusion — never reassure a patient as "just costochondritis" before the Undifferentiated Chest Pain chapter's red-flag screen has been applied and cleared.
- Relieve pain and restore normal activity, using the least aggressive effective conservative measures first, consistent with a condition whose treatment evidence base is genuinely limited.
- Set an honest, accurate expectation for the natural course — most patients improve substantially within about 3 weeks, though some tenderness can persist for months in a minority.
- Avoid both under-triage (missing a cardiac, infectious, or neoplastic cause) and over-treatment (repeated cardiac workup or escalating therapy for a confirmed benign, stable pattern).
- Recognize and separately manage the specific situations that are not simple idiopathic costochondritis — Tietze syndrome, slipping rib syndrome, and infectious costochondritis.
- Reduce unnecessary anxiety and repeat emergency visits through clear patient education about the condition's genuinely benign, self-limited nature.
Choose Initial Treatment
Step 1 — confirm eligibility for this pathway
This pathway applies only once the Undifferentiated Chest Pain chapter's red-flag screen is clear, and once history and exam are consistent with costochondritis (reproducible multifocal costochondral tenderness, no swelling, no fever/site infection, no red flag from the previous section). Any red flag, new swelling, or fever redirects the patient to that chapter's screen or to the specific alternative pathway (Tietze syndrome, infectious costochondritis) rather than this one.
Step 2 — first-line conservative therapy for every eligible patient
1st line, every patient explicit reassurance and education about the benign, self-limited natural history (most patients improve substantially within about 3 weeks with rest and anti-inflammatory therapy), plus activity modification (temporarily avoiding the specific movement or exertion that reproduces the pain) and local heat application.[1]
1st line analgesia an oral NSAID (e.g., ibuprofen or naproxen) or a topical NSAID (e.g., diclofenac gel), chosen by patient preference and comorbidity — topical therapy is a reasonable way to minimize systemic NSAID exposure in a patient for whom that matters.[1] Alternative, or if NSAID is contraindicated acetaminophen, a lidocaine patch, or capsaicin cream — see Pharmacologic Treatment Options and Drug Tables for dosing.[1]
Step 3 — symptoms persisting beyond several weeks, or beyond 1 year
Persisting despite an adequate first-line trial continue conservative analgesia and reinforce activity modification; consider referral for a targeted stretching physical therapy program, which has evidence specifically in patients with symptoms lasting longer than 1 year (a small reduction in pain was demonstrated in this group).[1]
Step 4 — recalcitrant cases
Recalcitrant to conservative measures over several months referral for a physician-administered local corticosteroid/lidocaine injection at the affected junction is a reasonable option — evidence for this is limited (a small observational study of 9 patients with Tietze syndrome showed improvement after 3 or more months of failed conservative therapy), so set expectations accordingly; this is not a pharmacist-initiated therapy.[1]
Tietze syndrome and infectious costochondritis — parallel notes
Tietze syndrome the same first-line conservative approach (NSAID/acetaminophen, heat, activity modification, reassurance) applies; the practical difference is that new or changing swelling deserves its own follow-up to confirm it is not enlarging or evolving into something else, rather than being assumed stable by default.[1]
Suspected infectious (septic) costochondritis do not manage with reassurance and NSAIDs alone — this needs prompt medical referral for imaging, culture, and antimicrobial therapy; it is outside the scope of this chapter's ambulatory conservative pathway.[2]
Non-Pharmacologic Treatment
- Reassurance and education — explicitly explain that costochondritis is a genuinely benign, self-limited inflammatory condition of the chest wall cartilage, not a sign of heart or lung disease, once that has been appropriately excluded; anxiety about the pain itself can otherwise drive repeat emergency visits.
- Activity modification — temporarily avoid or modify the specific movement, exercise, or repetitive activity that reproduces the pain (heavy lifting, certain upper-body exercise, forceful coughing where a cough suppressant may help break the cycle); this is not indefinite activity restriction, only until the acute inflammation settles.[3]
- Local heat application — the conservative measure with the most consistent support across sources; a reasonable first adjunct alongside analgesia.[1]
- Ice/cold application for an acute flare is a reasonable alternative some patients find more soothing than heat, though the evidence base specifically supporting cold over heat for costochondritis is not established — either is a low-risk trial.
- Cough suppression when a persistent cough is the specific perpetuating trigger.
- Targeted stretching physical therapy — reserve for symptoms persisting beyond about 1 year, where a small but real reduction in pain has been demonstrated; not needed as first-line therapy for a typical, briefer episode.[1]
- Set explicit return precautions before ending any encounter — every red flag from the Undifferentiated Chest Pain chapter's screen, plus new fever or swelling at the site, plus pain that does not improve as expected with conservative treatment.
Special Populations
Pregnancy
Postural change and altered rib cage mechanics as pregnancy advances are a plausible contributor to chest wall discomfort, though costochondritis is not caused by pregnancy itself. Any new chest pain in pregnancy still needs the same triage principles as the Undifferentiated Chest Pain chapter's Special Populations section — new hypertension, headache, or visual changes raise concern for preeclampsia/HELLP, and pregnancy is an independent VTE risk factor — before a chest-wall-pain explanation is accepted. Preferred if analgesia is genuinely needed acetaminophen and local heat/activity modification. Avoid NSAIDs from approximately 20 weeks of pregnancy onward Health Canada has confirmed a risk of fetal renal impairment and low amniotic fluid (oligohydramnios) with NSAID use from about 20 weeks, and NSAIDs are contraindicated in the third trimester (beyond 28 weeks) for this reason.[4] Topical diclofenac still carries systemic absorption and is subject to the same caution as oral NSAIDs in this window.
Breastfeeding
Acetaminophen and ibuprofen are considered compatible with breastfeeding at standard doses; confirm current specifics against each drug's own Drug Database entry.
Pediatrics and adolescents
Musculoskeletal causes are found in about 31% of adolescents presenting with chest pain, with costochondritis specifically accounting for roughly 13-14%, making it one of the more common benign explanations in this age group.[1][3] The same conservative, weight-appropriate approach (acetaminophen or ibuprofen, activity modification, reassurance) applies; still apply the full red-flag screen rather than assuming benign musculoskeletal pain by default simply because the patient is young, particularly if there is a personal or family history of a cardiac condition.
Older adults
Baseline cardiac risk is higher in this group, so the threshold for ECG (already recommended at age 35 and older) and for a broader workup should be lower, and any reproducible tenderness finding should be interpreted with correspondingly more caution rather than as reassuring on its own.[3]
Immunocompromised patients, people who inject drugs, and recent sternotomy/thoracic procedure
These are the specific populations at meaningfully higher risk of infectious (septic) costochondritis rather than the idiopathic form — maintain a lower threshold for imaging, culture, and prompt medical referral if fever, warmth, erythema, or fluctuance accompanies the chest wall pain, rather than defaulting to the conservative ambulatory pathway in this chapter.[2]
Renal and hepatic impairment
Use NSAIDs cautiously or avoid them in significant renal impairment given the risk of further renal injury, and reduce the acetaminophen total daily dose in significant hepatic impairment. Topical NSAIDs and lidocaine patches carry minimal systemic absorption and are reasonable alternatives when oral NSAID use is a concern.
Monitoring & Follow-Up
Set the follow-up interval around the expected natural course: most patients experience substantial improvement within about 3 weeks of rest and anti-inflammatory therapy.[2] A follow-up contact or visit at 2-3 weeks is reasonable to confirm the expected trajectory and to reassess the diagnosis if it is not being met.
Counsel explicitly that persistent mild tenderness at 1 year is a known part of the natural course for a minority of patients — roughly one-third in one series — and does not by itself mean treatment has failed or that the diagnosis needs to be reconsidered, provided the pain is stable, non-progressive, and not accompanied by any new feature.[3] Recurrence is possible; one series reported a recurrence rate of about 4% at 2 years, so counsel the patient on what to do if the same reproducible pattern returns (a repeat trial of the same conservative approach is reasonable, without needing to repeat a full cardiac workup, provided nothing about the pattern has changed).[1]
For a patient with Tietze syndrome, specifically confirm the swelling is stable or resolving at follow-up rather than enlarging. For a patient started on physical therapy or referred for a corticosteroid injection, confirm the referral occurred and that expectations for a modest, not guaranteed, benefit were set.
Common Errors to Avoid
- Reassuring a patient as "just costochondritis" based on reproducible chest wall tenderness alone, without first applying the Undifferentiated Chest Pain chapter's red-flag screen — reproducible tenderness does not exclude a concurrent cardiac cause, especially in a patient with cardiac risk factors.[3][1]
- Treating Tietze syndrome (swelling present) identically to costochondritis (no swelling) without recognizing the difference matters for follow-up of the swelling itself.
- Missing infectious (septic) costochondritis in a patient who injects drugs, is immunocompromised, or has had recent thoracic surgery, by attributing fever or local warmth to "just inflammation."
- Skipping an ECG in a patient over 35, or in anyone with cardiac risk factors or cardiopulmonary symptoms, before accepting the diagnosis.
- Continuing an ineffective NSAID or acetaminophen trial indefinitely rather than reassessing the diagnosis after a defined trial period.
- Treating persistent mild tenderness at 1 year as automatic evidence of treatment failure requiring escalating therapy, rather than recognizing it as a known part of the natural course for a minority of patients.
- Ordering routine imaging in every straightforward, reproducible, multifocal presentation without a red flag — imaging is typically normal in true costochondritis and adds little unless the presentation is atypical or a red flag is present.
- Reflexively repeating a full cardiac workup for a patient with a genuinely unchanged, previously investigated recurrence, rather than applying the same-pattern reasoning in the Undifferentiated Chest Pain chapter.
Clinical Decision Algorithm
Drug Tables
How to use this table: First-line therapy is oral or topical NSAID plus activity modification and heat, for a defined trial period. Non-NSAID and topical options are reasonable alternatives when an NSAID is not appropriate. The procedural option is reserved for genuinely recalcitrant cases and is not something a pharmacist initiates. Select any drug name to open its complete Pharmasist Drug Database page.
Oral NSAIDs — First-Line Analgesia
Use for a limited, defined course (e.g. 1-2 weeks) alongside activity modification and heat; reassess the diagnosis rather than extending indefinitely if not effective.
| Drug | Dosage | Adverse effects | Drug interactions | Comments |
|---|---|---|---|---|
| Ibuprofen | Adults: 200-400 mg PO every 6-8 hours as needed with food | GI upset, GI bleeding, renal impairment | Increased bleeding risk with anticoagulants; avoid combining with other NSAIDs; may reduce antihypertensive/diuretic efficacy | Confirm no renal impairment, active GI bleeding risk, or concurrent anticoagulation first. |
| Naproxen | Adults: 250-500 mg PO twice daily with food | GI upset, GI bleeding, renal impairment | Increased bleeding risk with anticoagulants; avoid combining with other NSAIDs | Twice-daily dosing is a reasonable alternative to ibuprofen for adherence. |
Topical Therapy — Minimizing Systemic Exposure
Reasonable first choice when the tender area is small, well-localized, and reproducible; lower systemic exposure than an oral NSAID.
| Drug | Dosage | Adverse effects | Drug interactions | Comments |
|---|---|---|---|---|
| Diclofenac (topical gel) | Adults: Apply to the affected area per product labelling, up to 4 times daily | Local skin irritation; low systemic exposure | Minimal systemic interaction potential at topical doses | Apply directly over the tender junction rather than diffusely across the chest wall. |
| Lidocaine (topical patch) | Adults: Apply to the intact, painful area per product labelling | Local irritation; rare contact sensitization with prolonged use | Minimal systemic absorption with topical use | A reasonable adjunct or alternative when NSAID use is limited by comorbidity. |
| Capsaicin (topical cream) | Adults: Apply a thin layer to the affected area 3-4 times daily | Marked burning/stinging on initial application, improving with continued regular use | None significant — minimal systemic absorption | Warn about initial burning so patients do not stop prematurely; wash hands after use and avoid eyes/mucous membranes. |
Non-NSAID Analgesia
For patients in whom an NSAID is contraindicated or not tolerated; no anti-inflammatory effect.
| Drug | Dosage | Adverse effects | Drug interactions | Comments |
|---|---|---|---|---|
| Acetaminophen | Adults: 500-1000 mg PO every 6 hours as needed, maximum 4 g/day (lower in hepatic impairment) | Hepatotoxicity with overdose or in significant hepatic impairment | None significant at standard doses | A reasonable analgesic alternative when NSAIDs are not appropriate (e.g., renal impairment, active GI bleeding risk, late pregnancy). |
Recalcitrant Cases — Physician-Administered Procedure
Reserve for pain that has not responded to an adequate conservative trial over several months. This is a physician-administered procedure, not a pharmacist-initiated therapy; evidence for its use in costochondritis/Tietze syndrome specifically is limited to a small observational study.
| Drug | Dosage | Adverse effects | Drug interactions | Comments |
|---|---|---|---|---|
| Methylprednisolone acetate/lidocaine (injection) | Adults: Per practitioner protocol; a single injection, with a low threshold to reassess rather than repeat if there is no response | Local pain/bruising at the injection site, transient hyperglycemia in patients with diabetes, skin or subcutaneous fat atrophy with repeated injection | None significant at the small local-infiltration volumes used | A single injection at the affected costochondral junction; set expectations that evidence is limited rather than framing this as a reliably effective option. |
References
- Costochondritis: Rapid Evidence Review — American Family Physician (Mott TF, Jones GN, Roman KM). Am Fam Physician 2021;104(1):73-78
- Costochondritis — StatPearls, StatPearls Publishing (Schumann JA, Sood T, Parente JJ). StatPearls [Internet], last updated April 2024
- Costochondritis: Diagnosis and Treatment — American Family Physician (Proulx AM, Zryd TW). Am Fam Physician 2009;80(6):617-620
- Advisory: Use of non-steroidal anti-inflammatory drugs (NSAIDs) beyond 20 weeks of pregnancy and risk of kidney damage in unborn babies, leading to low amniotic fluid — Health Canada. Health Canada Public Advisory, October 2020 (labelling update June 2021)
Professional reference only. Apply clinical judgment and verify patient-specific decisions against current authoritative guidance and product information.