Urticaria (hives) are itchy, red rashes or bumps caused by histamine release, often triggered by allergic reactions to foods, medication, dust exposure, infections, or stress.May 1st, 2026 8:19 PMShare this on :Keywordshistamine release skin allergiesTreatment of Skin allergies in Sanjay NagarUrticaria itchy red rashesallergic reactions to foods medicationsSanjay Nagar allergy treatment services