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 are welts on the skin that appear in varying sizes, shapes, and patterns, and can have numerous causes. Anybody can get them, and they can appear out of nowhere. One day you’re hive-free, and ...

Hives are a common symptom of COVID-19 that can occur during the day or night. Hives only at night might be from something you’re coming into contact with in the evenings. COVID-19 can cause hives ...

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 ...

Pictures of hives, also known as urticaria, can help you to identify these raised, red, itchy bumps or welts. Causes include stress, infections, food or latex allergies, medications, and environmental ...