Allergy is one of the most widespread diseases in the world. If the twentieth century was considered cardiovascular disease period, then XXI st century, after a forecast of the World Health Organization, will be a century of allergies. The number of allergy sufferers incessantly increase, this increase being higher in summer, while in winter is increasing respiratory allergic diseases. The mechanism of allergy consists in disorder of the immune response to certain stimuli, modifying the reactivity of substances and antigens molecules, in most cases being harmless to the body. A typical characteristic of allergic reactions is the damage of the organs, tissues and cells. The causes of triggering of allergies can be external - environmental factors - macro ecological (climate, season) and microecology (housing, employment). Internal causes are more complexes. It can include heredity, which regulates the functioning of our immune system; neuroendocrine dysfunction or the central nervous system, chronic infection outbreaks.