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What causes chest pain when breathing?

Updated Oct 19, 20261 min readAnswer
On this pageShort answer What to do Common questions Related questions Sources
Short answer

Pain sharpening on breathing in usually points to the chest wall or lung lining: muscle strain (after injury or exercise, eases resting), chest infection or pleurisy (with cough, coloured mucus, temperature), costochondritis (a tender press-able spot), or anxiety.

The cannot-wait causes share the territory: pulmonary embolism - sudden sharp breath-pain with breathlessness, often after a long flight, immobility, surgery, or on the pill - and collapsed lung - sudden one-sided sharp pain with breathlessness. Call emergency services for chest pain with breathlessness, coughing blood, faintness, or pain with sweating and sickness. Same-day care for breath-pain with fever and coloured mucus. Pymander is a free AI doctor, 24/7 by text - but breathlessness plus chest pain is an emergency combination.

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What to do

1Note what it came with:cough and fever point to infection; injury points to muscle.
2Press the spot:reproducible tenderness suggests chest wall, not heart or clot.
3Scan clot risks:recent flight, surgery, immobility, the pill, cancer.
4Breathlessness changes everything:chest pain plus shortness of breath is emergency care.

Common questions

What causes chest pain when breathing?

Chest pain that sharpens when you breathe in usually comes from the chest wall or the lung lining rather than the heart. The common causes, per the NHS pattern: a chest sprain or strain - pain after a chest injury or heavy exercise that worsens on breathing in and eases resting the muscle; a chest infection, pneumonia, or pleurisy - breath-triggered pain with a cough, yellow or green mucus, and a high temperature; and costochondritis, inflammation of the rib joints, which produces a sharp, tender, press-able spot. Anxiety can do it too - sharp pain in a stressful moment with a racing heart, dizziness, and tingling. The causes that cannot wait sit in the same territory: a pulmonary embolism (a clot in the lung - typically sudden sharp breath-pain with breathlessness, sometimes after a long flight, immobility, surgery, or on the pill), and a collapsed lung (sudden one-sided sharp pain and breathlessness, classically in tall, thin young people). Call emergency services for chest pain with breathlessness, coughing blood, a racing heart with faintness, or pain spreading with sweating and sickness. Same-day medical care for breath-pain with fever and coloured mucus. Pymander is a free AI doctor, 24/7 by text, that can help you sort the pattern - but breathlessness plus chest pain is a call-emergency-services combination.

About this page. Written and maintained by the Pymander Health team. Last updated September 3, 2026.

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