What Is Urticaria (Hives)?

Causes and Risk Factors of Urticaria (Hives)!
An allergy is not the only possible cause

Urticaria (hives) usually starts with a red, itchy patch of skin and develops into a raised welt with clearly defined borders.It is caused by an abnormal immune response. While this typically occurs as a result of an allergy to a food or medicine, there are non-allergic causes. Symptoms may come and go quickly or be longer-lasting.
Appearance may be enough for diagnosis, but chronic cases may require allergy testing, a physical challenge, or other tests. Antihistamines are typically used to treat urticaria, although H2 blockers, corticosteroids, antidepressants, and anti-asthma drugs may also be prescribed.