What should you know about polio virus symptoms?

Some infected people feel well. Others develop fever, tiredness, headache, nausea, vomiting, stomach pain, sore throat or general muscle discomfort. These early features can resemble other infections, so symptoms alone cannot confirm polio.

When the nervous system is affected, severe muscle pain, stiffness in the neck or back, unusual sensitivity, or weakness may occur. Paralysis can affect an arm, leg, or the muscles used for breathing. Weakness may be uneven between the limbs and can worsen quickly.

Contact a clinician promptly if someone has a sudden illness with weakness, difficulty walking, or new limb movement problems, particularly after possible exposure or travel to an area where polio is reported. Avoid close contact while seeking advice, wash hands carefully after using the toilet, and do not share cups or towels.

A clinician may ask about vaccination, travel, contacts and the order in which symptoms appeared. Testing can involve samples such as stool or throat material. Do not wait for paralysis before requesting medical advice.

Seek emergency care for rapidly increasing weakness, inability to stand or walk, trouble swallowing, choking, a weak cough, or breathing difficulty. Keep the person safe from falls and follow emergency instructions while help is arranged. These signs need immediate assessment because the breathing muscles can be involved.

Ask whether the symptoms need testing, whether household contacts need advice, and whether vaccination records or recent travel change the next step.