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Hives — also called urticaria (ur-tih-KAR-e-uh) — is a skin reaction that causes itchy welts. Chronic hives are welts that last for more than six weeks and return often over months or years. Often, the cause of chronic hives isn't clear.
For chronic hives, questions you may want to ask include: What is likely causing my symptoms? How long will hives last? What kinds of tests do I need? Do these tests require any special preparation? What treatments are available, and which do you suggest? What are the alternatives to the primary approach that you're suggesting?
Hives — also known as urticaria (ur-tih-KAR-e-uh) — is a skin reaction that causes itchy welts that range in size from small spots to large blotches. Hives can be triggered by many situations and substances, including certain foods and medications.
If you're experiencing mild hives or angioedema, these tips may help relieve your symptoms: Avoid triggers. These can include foods, medications, pollen, pet dander, latex and insect stings. If you think a medication caused your rash, stop using it and contact your primary care provider.
Cold urticaria (ur-tih-KAR-e-uh) is a skin reaction to cold that appears within minutes after cold exposure. Affected skin develops itchy welts (hives). People with cold urticaria experience widely different symptoms. Some have minor reactions to the cold, while others have severe reactions.
Dermatographia is a condition in which lightly scratching your skin causes raised, inflamed lines or welts. These marks tend to go away in less than 30 minutes. The condition is also known as dermatographism and skin writing. The cause of dermatographia is unknown, but it may be related to an infection, emotional upset or a medicine you're taking.
If you have cold urticaria, a raised bump (hive) will form a few minutes after the ice cube is removed. In some cases, cold urticaria is caused by an underlying condition that affects the immune system, such as an infection or cancer.
Learn about the symptoms, causes and treatment of this skin condition in which light scratching causes raised lines or welts.
Learn about the causes, symptoms and treatments of this itchy rash that most often begins before age 5, is persistent, and has periods of clearing and relapse.
Learn about the causes, symptoms and treatments of this itchy rash that most often begins before age 5, is persistent, and has periods of clearing and relapse.