Illnesses such as vasculitis, lupus and thyroid disease, can also cause hives. Common infections that may cause hives include colds and some bacterial or fungal infections. Illnesses and infections are among the most common cause of hives in children. Triggers may include: Infections and illness This leakage occurs when the body releases histamine, a chemical that defends against harmful substances. Hives appear when blood plasma leaks out of small blood vessels in the skin. Visit the Vaccine Education Center for pictures and additional information about hives and other rash-related illnesses. In general, chronic hives are often idiopathic, meaning that the trigger is not clear or unknown. Those that last longer than six weeks are called chronic hives. Hives that last for less than six weeks are called acute hives. A reaction can occur within one to three minutes. Solar hives are caused by exposure to sunlight or to a sunlamp.Cold water/liquids or frozen foods such as ice cream can provoke symptoms on the lips or in the mouth. Hives may appear on arms or legs and may affect any exposed area. Cold-induced hives occur after exposure to cold wind or water.An estimated 5 to 7% of patients who have hives experience cholinergic urticaria. This can be due to warm baths or showers, jacuzzi or hot tub use, exercise, a fever or emotional stress. Cholinergic urticaria are hives that develop when the body temperature rises.These hives are caused by stroking or rubbing the skin, and often occur after scratching, or when tight-fitting clothes rub the skin. Dermatographism, which occurs in 5% of the population.There are several different types of hives, including: Hives do not leave a permanent mark on the skin and more than 20 percent of the population has suffered an eruption of hives at some point in their lives. Hives can appear on any part of the body. They often appear in clusters, with new clusters appearing as other areas of the skin clear. Hives, which are also known as urticaria, appear suddenly and may leave in one to two hours. They can vary in size from as small as a pencil eraser to as large as a dinner plate. To help new and existing patients with their skin care at their various practice locations.Hives are red, itchy, swollen areas of the skin. Patients in the areas of Islamorada and Key West, FL who are in need of dermatological care can connect with the doctors at Keys Dermatology by calling (305) 296-3334. Which rashes are contagious?īelow is a small list of common rashes that are contagious, and can spread from person to person:ĭiscuss your skincare needs with the professionals at Keys Dermatology With the help of a dermatological professional, patients can find out what needs to be done to eliminate the rash while keeping them comfortable. Depending on the diagnosis, patients may be given medication or topical creams to help reduce itching, while other conditions might need to run their course to be resolved. This is why it is vital that patients with a rash get a proper diagnosis from a trained professional to then decide what can be done to ease or eliminate the rash. Additionally, some types of rashes are contagious, so itching and touching others can spread the rash. It is best for patients to try to avoid scratching the rash whenever possible to reduce the risk of infection. Many patients who have a rash experience itching and discomfort as well. At Keys Dermatology, we often see situations such as the conditions below: There are a wide range of reasons why a patient might see their dermatologist for a rash. Rashes might indicate a more serious issue, so a thorough evaluation with a dermatological professional is the first place to start! What causes rashes? However, just because they are common doesn’t mean they should be ignored or brushed off as simple irritation. Most patients will experience rashes at some point during their lives.
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