Does hives cause itchy skin?

Hives occur when chemical signals cause small blood vessels in the skin to leak fluid. This produces raised, itchy welts that may be pale, pink, or similar to nearby skin. Individual welts often fade while new ones appear elsewhere.

Triggers can include infections, medicines, foods, heat, pressure, or cold, although a clear trigger is not always found. Marks that stay fixed or leave bruising need medical review.

Cool the skin with a clean compress, wear loose clothing, and avoid rubbing or scratching. Note possible triggers and medicines taken before the episode. A pharmacist or clinician can advise whether an antihistamine is suitable, especially during pregnancy or when treating a child.

Call emergency services immediately for swelling of the lips, tongue, mouth, or throat; trouble breathing or swallowing; faintness; or rapidly worsening symptoms. Seek medical advice when hives keep returning, leave bruising, or occur with fever or significant illness.

Ask whether the pattern fits hives, what triggers are worth tracking, and which treatment is safe with your conditions and medicines. Ask how to recognise a serious allergic reaction and when recurring episodes need assessment.