Antihistamines are usually the primary treatment for toddlers, according to WebMD. Antihistamines may be administered by oral medication, eye drops or nasal spray depending on the child's age and the severity of reactions. If antihistamines are not fully effective, allergy shots may be recommended.
The American College of Allergy, Asthma and Immunology recommends that the first step parents should take to treat suspected allergies is to see an allergist. Allergy symptoms generally appear during a child's first few years. Symptoms may manifest in several ways, including skin rashes, asthma, hay fever and reactions to food. Before recommending a treatment, an allergist may run a series of tests to determine the type and the severity of allergies.