Allergy & Hayfever
An allergy is a hypersensitive response that occurs when your white blood cells are activated by something you're allergic to. This results in an inflammatory response that usually only involves mild-to-moderate itching and swelling. In some cases the response can be extreme and require urgent medical treatment. The best allergy treatment is to avoid the allergen in the first place; but sometimes that's not possible. That's when medications can help. They include antihistamines, nasal corticosteroids and decongestants, which are available over the counter or on prescription. People with some medical conditions such as glaucoma, prostrate problems, liver, kidney, heart or lung disease, should talk with their doctor before using antihistamines or decongestants.