are hives from an allergic reaction contagious?
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Hives can appear on any part of the body and are often triggered by an allergic reaction. Hives aren't contagious, meaning you won't develop them on your skin by touching hives on another person. However, the trigger that causes this skin reaction can be contagious.
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Hives, also known as urticaria, is a sudden-onset skin reaction resulting in red or white welts of varying sizes. As the reaction progresses, the welts appear and diminish. The welts are also known as wheals.
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An allergic reaction is the single most common cause for an outbreak of hives. It can happen to anyone at any time. Some children with allergies seemingly outgrow them, and adults can develop them almost out of nowhere. Food allergies (most commonly an allergy to citrus fruits) will cause hives.
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Hives are a red, raised, itchy skin rash that is sometimes triggered by an allergen. An allergen is something that produces an allergic reaction. It is also known as urticaria, welts, weals, or nettle rash. When an allergic reaction occurs, the body releases a protein called histamine.
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Be mindful that hives may also be one of the signs of a more serious condition called anaphylaxis or anaphylactic shock. While uncommon in babies, anaphylactic shock is a very severe reaction and may result in your infant having breathing difficulties, throat swelling, and loss of consciousness, among other symptoms.
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If your dog has gotten hot spots from constant itching and scratching, and nothing else, then no it's not contagious. A red and inflamed area that is caused by nothing but pure itchiness will not spread to another dog. However, if the hot spots are caused by fleas and ticks, then yes, then it will be contagious.
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In fact, viral infections cause more than 80 percent of all cases of acute hives in children. A variety of viruses can cause hives (even routine cold viruses). The hives seem to appear as the immune system begins to clear the infection, sometimes one week or more after the illness begins.
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Eczema isn't contagious. Even if you have an active rash, you can't pass the condition on to someone else. If you think you've gotten eczema from someone else, you likely have another skin condition. However, eczema often causes cracks in the skin, leaving it vulnerable to infection.
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Hives usually cause itching, but may also burn or sting. They can appear anywhere on the body, including the face, lips, tongue, throat, or ears. Hives vary in size (from a pencil eraser to a dinner plate), and may join together to form larger areas known as plaques.
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The poison ivy rash itself is not contagious, according to the Dermatology Clinic at UAMS. Neither will fluid from the blisters of a poison ivy rash spread poison ivy.
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While it's very unusual for someone to have an allergic reaction to a gnat bite, you should tell an adult right away if you feel sick, have a hard time breathing, or get hives (red patches on the skin that sting and itch). The doctor can treat allergic reactions with medicines.
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If a child develops a rash after getting the MMR vaccine, is he contagious? Transmission of the vaccine viruses does not occur from a vaccinated person, including those who develop a rash. No special precautions (e.g., exclusion from school or work) need be taken.
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Hives are usually caused by exposure to some substance to which you are allergic. Things that cause hives include environmental allergies, foods such as tree nuts, peanuts, shellfish and medications such as antibiotics or even aspirin or NSAID's. In some, even exposure to the cold can cause hives.
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The bottom line. Many viral infections can cause a skin rash. While the rash itself isn't contagious, the underling viral infection often is. Most viral infections clear up on their own, but some may require antiviral medication.
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The rash can also be red spots. Hives can be different sizes and shapes, and appear anywhere on the body in both adults and children. The rash is often itchy and sometimes feels like it's stinging or burning.
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About eczema Sometimes, tiny blisters containing clear fluid can form and the affected areas of skin can weep. Weeping is a sign that the dermatitis has become infected, usually with the bacterium Staphylococcus aureus ('golden staph'). Eczema is not contagious.
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Infections – Infections can cause hives in some people. In fact, viral infections cause more than 80 percent of all cases of acute hives in children. A variety of viruses can cause hives (even routine cold viruses).