Hives, also known as urticaria, is a kind of skin rash with red, raised, itchy bumps. Hives may burn or sting. The patches of rash may appear on different...

Cholinergic urticaria is a type of hives (urticaria) that is triggered by an increase in body temperature, such as during exercise, sweating, or exposure...

Autoimmune urticaria, also known as chronic autoimmune urticaria, is a type of chronic urticaria characterized by the presence of autoantibodies in the...

Dermatographic urticaria is a skin disorder and one of the most common types of urticaria, affecting 2–5% of the population. The condition manifests as...

Aquagenic urticaria, also known as water allergy and water urticaria, is a rare form of physical urticaria in which hives develop on the skin after contact...

Cold urticaria (essentially meaning cold hives) is a disorder in which large red welts called hives (urticaria) form on the skin after exposure to a cold...

Chronic spontaneous urticaria (CSU) also known as Chronic idiopathic urticaria (CIU) is defined by the presence of wheals, angioedema, or both for more...

Physical urticaria is a distinct subgroup of urticaria (hives) that are induced by an exogenous physical stimulus rather than occurring spontaneously...

Solar urticaria (SU) is a rare condition in which exposure to ultraviolet or UV radiation, or sometimes even visible light, induces a case of urticaria or...

Urticaria pigmentosa (also known as generalized eruption of cutaneous mastocytosis (childhood type): 616  ) is the most common form of cutaneous mastocytosis...