Overview
Hives are common and usually harmless. Short episodes are often triggered by an allergy or infection. Hives lasting more than six weeks are called chronic urticaria.
Symptoms
- Raised, itchy red or skin-coloured welts
- Welts that change shape and move around
- Swelling of the lips, eyes or face in some people
Causes and risk factors
Triggers include foods, medicines, insect stings, infections, heat, pressure and stress. Often no cause is found.
Diagnosis
A doctor diagnoses hives by looking at the skin. Blood or allergy tests may be done for chronic hives.
Treatment
Treatment includes antihistamines and avoiding known triggers. Chronic hives may need specialist medicines.
When to see a doctor
See a doctor if hives last more than a few days. Seek emergency care for swelling of the tongue or throat, difficulty breathing or feeling faint.
This information is for general education and does not replace advice from a qualified doctor. For a medical emergency, call +92-51-8446666 or go to the nearest emergency department.
