An overdressed baby who spends time in the hot summer sun may develop a heat rash. It is most common in warm, humid areas during the summer months. What causes it: Miliaria is primarily caused by clogged sweat ducts during the summer season or hot temperatures. It is commonly seen in areas of the body where sweat can get trapped, such as the neck, upper chest, or elbow creases. What it looks like: Also called "prickly heat," miliaria is characterized by a rash with clear, fluid-filled bumps on the skin that do not itch or hurt. Miliaria, or heat rash, is a skin condition triggered by blocked sweat glands and ducts. Seek emergency care if you have hives with additional symptoms, such as swollen lips and trouble breathing. They may perform allergy testing or prescribe a medication such as an antihistamine to clear the rash. When to see a doctor: If home remedies do not provide relief from hives, see your healthcare provider. Wear loose-fitting clothing to prevent further irritation to the affected skin.Over-the-counter medications, such as antihistamines, can help block the release of histamine and provide relief from hives, according to the American Academy of Dermatology.Cut your nails short to avoid scratching the rashes and breaking the skin, which can increase the risk of infection.Cool oatmeal baths to soothe itchy, irritated skin.Apply an ice pack over the rash to relieve inflammation and itching.Other methods to treat hives at home include: Home remedies: If you know what caused your allergic reaction and subsequent hives, avoid future exposure to the allergen. Working out or exercise: The increase in body temperature and subsequent sweat may cause hives.Hives may also appear on parts of the body that are rarely exposed to the sun if left uncovered while outside. This can occur if you've been indoors throughout winter and spend time in the sun when it finally warms up. Sunlight and heat: Although rare, some people develop hives after exposure to the sun.Stress: Stress causes the body to release cortisol (stress hormone), which is associated with chronic hives in some people.Even very cold swimming pools or consuming cold foods can trigger hives in some people. Low temperatures: Cold temperatures can sometimes cause hives within minutes of exposure to the cold.Infections: Several bacterial and viral infections, including tooth decay, may cause hives to develop.Exposures to allergens such as pollen, pet dander, or seafood very commonly result in hives. What causes them: According to the American Academy of Allergy Asthma & Immunology, skin allergies that lead to hives are often attributed to medication and food allergies. They are often accompanied by intense itching. In general, hives appear in clusters, covering part or all of the body. Wheals (welts) may disappear quickly and be replaced by newly formed ones. Characterized by blanching, the redness of the bumps may go away and turn pale when pressed on. They may appear ring-shaped, oval-shaped, or circular with a pale center and red halo or flare in the outer rim. What they look like: Hives are smooth, raised, and pink to reddish bumps or wheals that can range in size. If you notice itchy bumps on your skin but know you haven't been exposed to mosquitos, you may have hives. Hives (urticaria) are a condition that looks like raised, itchy bumps on the skin that can appear similar to mosquito bites. ![]() You may find that the rash is one of these skin conditions. These details can help you identify the possible cause. Before you talk to your healthcare provider, take note of how long you've had the rash, the part of the body affected by the rash, the size of the rash, and whether or not it itches. To the untrained eye, many rashes look the same. When you discover a rash on your body (or your child's body), it's important to closely study the rash. 4 Common Allergic Reactions That Cause Skin Rashes.What Does It Mean When Old Mosquito Bites Still Itch?.Once the histamine is released into the bloodstream, it can accumulate in the skin and cause a visible rash with swelling, irritation, and itchiness. When a person is exposed to an allergen (such as pollen, bee stings, foods, latex, certain chemicals), the body releases histamines in response. These cells contain chemicals called histamine. The lining of the skin contains numerous mast cells, which are designed to protect the body against bacteria and parasites. Rashes That Might Look Like a Mosquito BiteĪ rash is an area of skin that is irritated, inflamed, and/or swollen.
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