Viruses hives

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If you suspect that your diet may be a trigger for your hives, your doctor may prescribe an elimination diet, which, over a period of several weeks, will test for a food intolerance. Hives triggered by sunlight usually disappear within a day, but in the majority of cases, they recur. Winter is not exactly the most popular season, and with good reason for those who live with chronic hives: The cold can trigger a flare-up in some.

Besides the weather, other cold-related triggers include chilly foods and swimming pools. For people who are allergic to the cold, full-body immersion in a swimming pool, in particular, can trigger a severe reaction that involves not just hives but allergic shock anaphylaxis and loss of consciousness.

If it turns out that cold is a trigger for you, your doctor will recommend that you protect your skin from the cold and take your medications as prescribed. According to the American Osteopathic College of Dermatology, about half the cases of chronic idiopathic hives are due to immune systems that attack the body's own tissues also known as autoimmunity.

Thyroid disease is the most commonly reported autoimmune condition in people with chronic hives, followed by rheumatoid arthritis and type 1 diabetes. A study published in September in the European Journal of Dermatology found that celiac disease is also associated with chronic hives. Other potential triggers of chronic hives include heat and aggravating your skin by scratching it or putting pressure on it for example, by wearing tight clothes or sitting on a hard surface.

Keeping a diary in which you record when and where your symptoms developed or worsened can help you and your doctor find clues and pinpoint your triggers, says Anand. If the food is a high risk one such as peanuts , consult an allergist. Hives from foods usually resolve in 6 hours. Hives from infections last for days. Bee Sting. Widespread hives after a sting may be part of a serious allergic reaction. Need to consult an allergist. Anaphylactic Reaction Very Serious.

The sudden onset of hives with trouble breathing or swallowing. This is a severe allergic reaction to an allergic food or drug. Most often begins within 30 minutes of swallowing the substance. Always within 2 hours of exposure. Causes of Localized Hives Irritants. Hives just in one spot are usually due to skin contact with an irritant.

They are not an allergy. Many plants cause skin reactions. Sap from evergreens can cause local hives. Playing in the grass can cause hives on exposed skin. Pet Saliva. Some people get hives where a dog or cat has licked them.

Some children get hives if a food is rubbed on the skin.