Atopic dermatitis causes repeated attacks of itching and rash that can become quite severe. It is most common in babies and children. Older studies indicated that most children outgrow the condition. More recent studies report that many p
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Symptoms of an allergic reaction to insect stings vary from mild to life-threatening. The severity of your allergic reaction depends on your sensitivity to the allergens in the venom—not necessarily on the number of stings or how
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Symptoms of food allergy can affect many parts of your body, including your:
The first time you eat a food that triggers an allergic reaction, your body's immune system recognizes the food as a foreign substance (allergen). Your body reacts by developing antibodies against the food. When you eat the of
Symptoms of drug allergies can be mild or life-threatening and appear within 1 to 72 hours. They include:
Symptoms of lactose intolerance can be mild or severe, depending on how much lactase your body makes. Symptoms usually begin 30 minutes to 2 hours after eating or drinking milk or milk products. If you have lactose intolerance, your s
The most common symptoms of the rash (allergic contact dermatitis) from poison ivy, oak, or sumac are:
Contact with poison ivy, oak, or sumac can cause a rash (allergic contact dermatitis). The rash is caused by contact with the oil (urushiol) in these plants. Urushiol is an allergen, so the rash is actually an allergic reaction to
Knowing which foods trigger food allergies and avoiding those foods is the best way to prevent allergic reactions.
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