Acute pericarditis: chest pain that eases when you lean forward
Inflammation of the sac around the heart
Dr. Camille Roux
Internal medicine physician

In simple terms
How to tell it from a heart attack, why the pain moves with position, and why treatment must be completed.
What it is, in plain words
The heart sits inside a thin double-layered sac called the pericardium. When it becomes inflamed the two layers rub together and produce a sharp pain. It is usually benign but often frightening, because the pain sits exactly where people expect a heart attack.
Signs to look out for
- Sharp chest pain, worse lying flat and on deep breathing, better sitting up and leaning forward
- Pain radiating to the left shoulder or the ridge of the shoulder blade
- Low-grade fever and flu-like symptoms in the preceding days
- Palpitations and fatigue
- Breathlessness and swollen neck veins if fluid collects and compresses the heart
Why it happens
Most cases follow a viral infection. Others follow a heart attack or heart surgery, or are caused by autoimmune diseases, kidney failure, tuberculosis or cancer.
How doctors confirm it
The electrocardiogram shows characteristic widespread changes, blood tests show raised inflammatory markers, and an echocardiogram looks for fluid around the heart. Troponin may be mildly raised if the heart muscle is also involved.
Treatments and solutions
- High-dose anti-inflammatory medicine such as ibuprofen, or aspirin after a heart attack, tapered over weeks
- Colchicine added for three months, which halves the risk of recurrence and should not be skipped
- Rest from strenuous exercise until symptoms settle and blood tests normalise
- Corticosteroids reserved for specific causes, because they increase recurrence
- Drainage of the fluid urgently if the heart is being compressed
Living with it day to day
Recurrence happens in up to a third of people, most often because treatment was stopped too early. Complete the full course, return to sport gradually, and keep a note of what helped.
When to seek medical help
Go to hospital for severe or crushing pain, fainting, high fever, or increasing breathlessness with swollen neck veins.
This article explains general health information in simple language. It does not replace advice from your own doctor.
The words explained
Medical terms used above, in everyday language.
- Inflammation
- The body's reaction to injury or irritation: redness, swelling, heat or pain.
- Symptom
- A sign you can feel or see that something is wrong, like pain, tiredness or a rash.
- Anti-inflammatory
- A medicine or food that calms swelling and pain.
When should you see a doctor?
- Your symptoms last more than a few weeks or keep coming back.
- They get worse quickly, or stop you doing everyday things.
- You notice sudden pain, breathing trouble, fainting or bleeding — seek urgent care.
- You already take medication and want to change anything about it.
This article explains general health information. It does not replace advice from your own doctor.
Frequently asked questions
- What is Acute pericarditis: chest pain that eases when you lean forward?
- How to tell it from a heart attack, why the pain moves with position, and why treatment must be completed.
- What are the main symptoms or signs of Acute pericarditis: chest pain that eases when you lean forward?
- Common signs vary from person to person. The article above lists the symptoms to watch for, how they progress, and when they need medical attention.
- When should you see a doctor for Acute pericarditis: chest pain that eases when you lean forward?
- See a doctor if symptoms last more than a few weeks, get worse quickly, stop you doing everyday things, or if you notice sudden pain, breathing trouble, fainting or bleeding.
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