Solar urticaria is a rare allergic reaction to sun exposure. The condition causes an itchy rash or hives that appear on any skin that has been exposed to the sun. The more skin that is exposed to ...

Hives are a skin reaction of itchy bumps that may burn or sting. They can develop not only from an immune response to an allergen but also to heat. While you may think of hives or urticaria as ...

Aquagenic urticaria is an extremely rare type of hives (raised, itchy rash) triggered by contact with water. Some people call aquagenic urticaria "water allergy." Urticaria is the medical term for ...

Chronic urticaria is defined as wheals (hives), angioedema (swelling), or both that have been continuously or intermittently present for at least 6 weeks, 1,2 in contrast to acute urticaria, which is ...

Aquagenic urticaria refers to hives caused by exposure to water. It is also known as water allergy and is an extremely rare condition, with only 37 cases reported in medical research. Aquagenic ...