Allergies are due to hyper-reactions of the immune system to a particular normally harmless substance in the environment. These substances are called allergens and the most common ones are dust, pollen, animal hair and grasses.
The good news is that allergy symptoms can be alleviated and allergies gradually desensitized. To do this, Allergy Relief from A.Vogel is an excellent remedy. You can combine it with Stinging Nettle on a regular basis and take a bottle of Boldocynara every change of season.