Costochondritis and Chest Wall Pain: When the Ribs Are to Blame

The Thoracic Wall: More Complex Than It Appears

The thoracic cage is a dynamic structure. Each rib articulates at two points posteriorly — the costovertebral joint (rib head to vertebral body) and the costotransverse joint (rib tubercle to transverse process) — and travels anteriorly to connect with the sternum through the costal cartilage. Ribs one through seven connect directly to the sternum via individual costal cartilages (true ribs); ribs eight through ten share a cartilaginous connection to the seventh rib before reaching the sternum (false ribs); and ribs eleven and twelve are free anteriorly (floating ribs). This architecture allows the thoracic cage to expand three-dimensionally during breathing — elevation ("pump handle") and lateral flaring ("bucket handle") — while simultaneously protecting the thoracic viscera and providing attachment for respiratory, trunk, and shoulder musculature.

Costochondritis

Costochondritis is inflammation at the costochondral junctions — the articulations between the bony rib and its costal cartilage. It is the most common musculoskeletal cause of chest pain and is responsible for a significant proportion of emergency department presentations with chest discomfort that ultimately proves non-cardiac. The second through fifth costochondral junctions are most commonly affected. The diagnosis is confirmed by localised point tenderness at the costochondral junction, reproduced on direct palpation. Pain is typically unilateral, sharp, and worsened by deep breathing, coughing, forward trunk flexion, and sustained arm positions. The absence of swelling at the cartilage junction distinguishes it from Tietze syndrome, in which fusiform swelling is a defining feature.

Costovertebral and Costotransverse Dysfunction

Beyond the anterior cartilage, the posterior rib joints — costovertebral and costotransverse — are a frequently overlooked source of thoracic and chest wall pain. These joints can develop restricted mobility, localised synovial irritation, or hypomobility following acute thoracic rotation strain, a period of sustained posture, or cumulative repetitive loading. The pain produced is typically localised to the paraspinal region two to four centimetres lateral to the thoracic spinous processes, with referral following the rib anteriorly around the chest wall. Patients frequently describe a "catching" sensation on deep inhalation, an inability to take a full breath without sharp posterior pain, and discomfort in sustained trunk rotation. Clinicians can assess costovertebral and costotransverse mobility through passive accessory intervertebral movement techniques, noting pain provocation, resistance, and asymmetry.

Management

Costochondritis is a self-limiting condition that typically resolves within weeks to months. Management in the acute phase focuses on activity modification — avoiding sustained arm positions that load the anterior chest and reducing provocative trunk movements — combined with appropriate pain management. Topical anti-inflammatory gels applied directly to the tender junction can reduce local inflammation with minimal systemic effects. Manual therapy directed at the mid-thoracic spine and costovertebral joints improves thoracic mobility, reduces the compressive demands on the anterior costochondral junction, and often produces immediate relief of the catching pain on inspiration. Dry needling to the intercostal and parasternal musculature can reduce associated muscle guarding. For costochondritis persisting beyond three months, corticosteroid injection at the costochondral junction can provide lasting relief in refractory cases.