Hives are a sign that the whole body is experiencing a hypersensitivity reaction. Hives occur when the body's capillaries and tiny veins get leaky. Fluid escaping from some of these blood vessels becomes trapped in parts of the skin and lining membranes of the body, causing localized swelling.
Hives themselves are not contagious, but the triggers of hives, especially viruses, bacteria, and parasites, may be contagious.
When you have an allergic reaction to a substance, histamine and other chemicals are released into your bloodstream, causing itching, swelling, and other symptoms. Hives are a common reaction, especially in people with other allergies like hay fever.
Allergic reactions, chemicals in foods, insect stings, sunlight exposure, or medicines can all cause histamine release. Sometimes it's impossible to find out exactly why hives have formed.
Hives may also develop from:
The following are the symptoms of hives:
There are different types of hives. Some of them are listed below:
The best treatment for hives and associated swelling is to identify and remove the trigger, but this is not an easy task. Treatment may not be needed if the hives are mild. They may disappear on their own. To reduce itching and swelling:
If your reaction is severe, especially if the swelling involves your throat, you may require an emergency shot of epinephrine (adrenaline) or steroids. Hives in the throat can obstruct your airway, making it difficult to breathe.
The best way to prevent another bout of hives is to identify your child's triggers and avoid them. If you know in advance that your child will be exposed to a trigger, a preventive dose of antihistamine can prevent or minimize the hives. Avoid exposure to substances that give you allergic reactions. Don't wear tight-fitting clothing and avoid hot baths or showers just after an episode of hives. These can both cause the hives to return.
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