how long do hives normally last
Chronic urticaria and/or angioedema are hives or swelling that lasts more than 6 weeks. The cause is usually harder to find than in acute cases. The causes can be similar to those of acute urticaria but can also include your immune system, chronic infections, hormonal disorders, and tumors.
Hives, also known as urticaria, usually starts as an itchy patch of skin that turns into swollen red welts. It can be set off by many substances or situations. The itching may be mild to severe. Scratching, alcoholic beverages, exercise and emotional stress may worsen the itching.