Prevention and recommendations
It is important to check the environmental conditions surrounding you (home, work, contact with animals, etc), as well as the triggering factors of the symptoms (time of year in which the symptoms affect you, hobbies, etc.) and your family history of allergy. This will make it easier to identify the type of allergy.
In general, you should avoid those situations in which you repeatedly suffer an allergic reaction. Avoiding contact with the allergen is the best way to prevent the allergic reaction and although it is not easy, there is advice to help you.