Množina: allergies

Hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity; SYN. allergic reaction.
Medicine, abnormal sensitivity toward a substance or germ, due to prior inoculation with that substance or germ; anaphylaxis; abnormal sensitivity to e.g. pollen, dust, etc.
Special sensitivity of the body that makes it react with an exaggerated response of the natural immune defense mechanism to the introduction of an otherwise harmless foreign substance (allergen).
Hay fever in summer is caused by an allergy to one or more kinds of pollen. Many asthmatics are allergic to certain kinds of dust or to microorganisms in animal fur or feathers. There are many different kinds of allergies, producing a range of effects. Some people experience skin reactions, such as dermatitis, from drugs, cosmetics or household cleaners; some suffer gastric upsets due to allergens in food. A severe allergic reaction may produce profound shock. Various drugs can be used to counteract allergic symptoms, including antihistamines and steroids.