Or, they may be chronic, lasting for more than six months and/or recurring frequently over months or years. There are many possible causes of hives, including allergies, infections, stress ...

Hives are severe or cover a large area of your body. You believe your hives are caused by an allergy. Anaphylaxis is a medical emergency. If you or someone else is experiencing symptoms like ...

Hives rashes are not contagious, meaning you won’t develop the rash by touching hives on another person. However, some contagious infections can cause hives. Hives, or urticaria, causes welts on ...