Articles Index

Sun Rash
Solar urticaria is an uncommon form of chronic hives caused by exposure to the sun. Hives can form on areas of skin directly exposed to sunlight. Find out more about solar urticaria, how it's diagnosed and the treatments available.

Hives and Heat Rash
Cholinergic urticaria is a common form of hives caused by increased heat exposure. Symptoms of small, itchy red bumps occur after hot showers, exercise, eating spicy foods and from sweating in general. Find out more about the symptoms of cholinergic urticaria, how it's diagnosed and the treatments available.

Hives Symptoms and Treatment
If you or a loved one suffer from hives, start here to learn all about the causes, evaluation and treatment of hives (urticaria) and swelling (angioedema).

Cold Urticaria
Cold urticaria is a form of chronic hives caused by exposure to cold environments, cold food and drinks, and contact with cold water. People may experience severe allergic reactions or anaphyalxis in some instances. Find out more about cold urticaria, what causes it, and the treatments that are available.

Dermatographism
Dermatographism is a common form of physical urticaria characterized by red, itchy bumps and lines on the skin as a result of pressure on the skin or with stroking the skin. Learn more about the causes and treatment of dermatographism.