Medically reviewed by Katlein Franca, MD Doctors use a process of elimination to diagnose chronic hives, rather than a single test.The diagnostic process involves determining how long the hives have ...

In a healthy body, mast cells (the “lookout” cells of the immune system) only release histamine when they detect a foreign invader, like pollen or venom. In CSU, these cells dump histamine into the ...

Hives (urticaria) may appear as pink-red bumps, or patches on your skin, and are very itchy. They are often signs of an allergic reaction but can also be idiopathic, meaning the cause is unknown.

Hives, known in the medical world as urticaria, are your skin’s reaction to histamine (a chemical released by the body’s immune system in response to an allergen) and other inflammatory signals being ...

Hives are a type of rash that results from an allergic reaction, insect bite, infection, and more. You can identify hives by pressing down on the bump — if it turns white, it's a hive. You should see ...

Chronic hives can be more than itchy and irritating. They can be embarrassing, particularly in dating and relationships. Talk about your condition with friends and loved ones. It can put you and those ...

Postpartum hives look like a red, bumpy rash. While uncomfortable, they usually resolve quickly with home treament. You’ve heard of new symptoms making their debut in the postpartum period, but did ...