Urticaria Hives (Urticaria): Causes, Symptoms & How to Get Rid of Them Hives, or urticaria, are an allergic skin reaction characterized by swollen, red spots that itch. They can be caused by mosquito bites, a fabric allergy or changes in temperature.
Urticaria Stress Hives: Symptoms, Diagnosis & Treatment What is it: Stress hives are raised, red bumps on the skin that are triggered by a strong emotional reaction.
Urticaria Can You Be Allergic to Water? (Aquagenic Urticaria) What is it: Being allergic to water is a rare condition in which the skin becomes red, patchy and irritated when in contact with water.
Urticaria Cholinergic Urticaria: Symptoms, Causes & Treatment Cholinergic urticaria is a condition associated with hives that appear when body temperature increases.