Symptoms of AFM
- AFM is an uncommon but serious neurologic condition. Sudden onset of arm or leg weakness, loss of muscle tone, and loss of reflexes are the most common symptoms.
- Seek medical care right away if you or your child develops any of these symptoms.
Most people will have sudden onset of:
Arm or leg weakness
Loss of muscle tone and reflexes
Some people will also have:
Pain in neck or back
In uncommon cases, people may also have numbness or tingling in arms or legs.
The most severe symptoms of AFM are:
- Respiratory failure (when the muscles involved with breathing become weak and require machines to help patients breathe).
- Serious neurologic complications such as body temperature changes and blood pressure instability that could be life threatening.
Seek Medical Care Right Away
- If you or your child develops any of these symptoms, you should seek medical care right away.
- Clinicians should immediately hospitalize patients since AFM can progress rapidly and require urgent medical care, like assistance with breathing.
- Your clinicians should collect information about your symptoms and send this information to their state or local health departments.
Page last reviewed: December 29, 2020