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Find out about hives (also called urticaria), which is a raised, itchy rash that's usually caused by a reaction to things like food, pollen, insect bites or chemicals.
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- What Are The Symptoms of Acute Hives?
- What Are The Symptoms of Chronic Hives?
- What Causes Hives?
- Are Hives Contagious?
Hives look different depending on the person and the situation. They can show up anywhere on your body. Signs of acute hives include: 1. Raised welts or bumps on your skin. The bumps may look reddish on lighter-colored skin. 2. Hives blanch (the center of the hive becomes pale when pressed). 3. Itchy skin. 4. Swelling under your skin causing puffin...
In many respects, chronic hives and acute hives may look alike: they can be itchy, swollen raised welts that turn lighter in the center and with pressure. However, chronic hives can: 1. Shift sizes and shapes. 2. Appear, disappear and then reappear at least every few days for long periods of time, even months or years. 3. Happen along with heat, ex...
Causes of acute hives
Acute hives are often an allergic reaction to something you put into your body, like food, drink or medication, or something that you touch. The skin has immune cells called mast cells. When these cells go into action, they release chemicals, including one called histamine. Histamineis the reason that hives form. You can also get hives for a variety of other reasons. Some of these include having an infection, stress or physical pressure on your skin. It’s not uncommon for healthcare providers...
Causes of chronic hives
Unlike acute hives, chronic hives aren’t usually caused by allergies. They may be caused by infections from bacteria or viruses, or as a result of other medical conditions like lupus. Your provider may not discover an exact cause. In these cases, chronic hives are said to be idiopathic or spontaneous. Chronic hives do last for long periods of time but usually aren’t permanent. They can be uncomfortable, but they aren’t life-threatening.
Unlike some other skin conditions, hives aren’t contagious. But if you develop hives because your skin is exposed to secretions from a plant like poison ivy, you can spread the allergenic plant product to others until you wash it off your skin.
Causes of hives. Hives occur when histamine and other chemicals are released from under the skin’s surface. This causes the tissues to swell. Histamine can be released for many reasons, including: eating certain foods; an insect bite or sting; cold – including exposure to cold water or wind; heat – including from exercise or eating spicy food
Mar 16, 2024 · Hives Causes. There are several types of hives, including: Acute urticaria. These are hives that last less than 6 weeks. The most common causes are foods, medications, and infections.
Apr 25, 2023 · 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.
Nov 9, 2023 · Causes. Getting medical help. Diagnosis. Treatment. Can they go away on their own? FAQ. Summary. Hives that come back daily for 6 weeks or more are called chronic hives, or chronic urticaria....
Jul 18, 2023 · Hives, or urticaria, are itchy, raised welts that are found on the skin. Hives are often caused by an allergic reaction. Learn the signs and how to identify them.
