
Allergology
If the eyes itch and water, the nose runs constantly or the lungs whistle, then the suspicion is obvious that it is an allergic reaction, which occurs in spring/summer (during the pollen season) or in autumn/winter (house dust mites).
An allergy is a hypersensitivity to normally harmless substances in the environment (allergens) to which the immune system reacts with a disproportionately strong defensive response (allergic reactions).