Pressure urticaria is a form of hives. It develops several hours after applying sustained pressure to the skin, causing painful swelling. Treatment combines pressure avoidance with medications such as ...

Urticaria, also known as hives, is an outbreak of pale red bumps or welts on the skin that appear suddenly. The swelling that often comes with hives is called angioedema. Allergic reactions, chemicals ...

Hives can occur anywhere on the body. However, exposed skin, such as arms and legs, may be more susceptible to external hives triggers such as allergens, heat, and pressure changes. Other common ...