Many foods contain high histamine levels, including alcohol, aged cheeses, and fermented products. Certain medications and health conditions can also cause a histamine imbalance. Histamine is a ...

A rash, or dermatitis (eczema), on the neck is skin inflammation and irritation. It causes a change in appearance and texture on the front, sides, or back of the neck. The appearance of a neck rash ...

If a rash seems to move around your body, it is likely hives. Hives, medically known as urticaria, are a common rash that can be triggered by many different substances. Hives come and go, with some ...

What Causes a Rash in Your Armpit? An armpit rash is more common than you might think. Your armpits probably come into contact with more chemicals each day than most other parts of your body. Don’t be ...

A rare condition means ice cubes, cold drinks and winter air can all trigger hives, swelling and even anaphylaxis.

Norovirus doesn’t usually cause a rash, though some people develop hives. A rash that accompanies stomach symptoms may suggest a different stomach virus or inflammatory bowel disease. Norovirus is a ...

Eating fish is generally considered to be healthy. However, as with almost all rules, there are exceptions. A 50-year-old woman experienced an adverse reaction after eating a lightly seared tuna steak ...