Hay fever, also called allergic rhinitis, is caused by an overactive immune response to harmless allergens. Here's a breakdown of hay fever causes, symptoms, and related factors:What Triggers Hay ...

For the first time, scientists have found that measuring airborne allergen levels, instead of the traditional method of pollen count, will dramatically help hay-fever sufferers pre-empt risk and ...

Hay fever, also known as allergic rhinitis, is the condition responsible for seasonal allergies or allergic reactions to other environmental allergens, like dust mites and animal dander. Estimates ...