Rheumatic fever

Also called Acute rheumatic fever

Rheumatic fever is a rare condition that can develop after an untreated infection with group A strep bacteria, such as strep throat or scarlet fever. The immune system reacts and causes inflammation in the heart, joints, skin and brain. It is now uncommon in Europe but still affects children in many parts of the world.

Last updated Nov 9, 2026

What it is

It is treated with antibiotics, anti-inflammatory medicines and rest. Some people need long-term antibiotics to stop it coming back.

It can cause lasting damage to the heart valves (rheumatic heart disease), so heart checks are needed.

Common signs

  • High temperature
  • Painful, swollen joints that move from one joint to another
  • Chest pain or breathlessness
  • A pink rash with ring shapes
  • Small lumps under the skin
  • Jerky, uncontrolled movements

How it is usually diagnosed

  • Questions about recent sore throat
  • Blood tests for strep infection and inflammation
  • ECG and echocardiogram

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Throat swab and blood test results
  • ECG and echocardiogram reports
  • Cardiology letters
  • Antibiotic plans

Questions to ask your doctor

  • Has my heart been affected?
  • How long will I need antibiotics?
  • How often should my heart be checked?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Chest pain, severe breathlessness or fainting: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources