An arrhythmia can cause your child's heart to pump blood less efficiently. Many arrhythmias are harmless and don't need to be treated. But if it causes symptoms, it may need treatment.

A detailed look at nasal allergies, and what to do when they affect your child.

Hives are raised, red, itchy bumps on the skin. The bumps come and go for a few days and then go away completely. Here's what you need to know.

Anaphylaxis is the most severe type of allergic reaction. It may happen from a few minutes to an hour or 2 after contact with an allergen. Anaphylaxis can cause the airways to swell, making it hard to breathe.

When a child has a wheat allergy, even a small amount of wheat can cause a life-threatening reaction. For that reason, your child must stay away from all foods that contain wheat.

Read on for helpful information about keeping your child safe when they have a tree nut allergy. Includes foods to stay away from, nonfood allergens, how to read food labels, and preventing accidental exposure.

Soy foods, such as tofu, may not play a large part in your child's everyday diet. But soy is used as a filler, binder, or flavoring in hundreds of products.

Children allergic to 1 type of shellfish, such as lobster, often react to other types as well. For that reason, your child should stay away from all shellfish.

When a child has a peanut allergy, any contact with peanuts may cause a life-threatening reaction. For that reason, your child must stay away from peanuts and anything that contains them.

When a child has a milk allergy, even a small amount of milk can cause a life-threatening reaction. For that reason, your child must stay away from dairy products and any foods likely to contain milk.