Allergy is understood to mean hypersensitivity or an incorrect reaction of the body to substances of various nature, which, in general, should be safe for humans. In the 21st century, this disease has become quite widespread. According to statistics, approximately every third inhabitant of our planet is familiar with allergies. However, most of them are children. Signs of allergies can manifest themselves in different ways. This is explained by the fact that various stimuli penetrate the human body in completely different ways. So, for example, volatile substances such as pollen, dust, germs and so on fall through the throat and nose. Substances that can cause allergies, such as cosmetics or detergents, get through the skin. Medications, certain fluids, and food can enter through the mouth and digestive system. Intravenous or subcutaneous routes, allergens can come in the form of vaccines, drugs, poison from insect bites.
Most often, signs of allergies are observed from the gastrointestinal tract, skin and respiratory tract. The reaction can occur immediately, that is, almost immediately after making contact with the stimulus, or after several hours or days (delayed). Moreover, there is a statement that the reaction itself immediately begins to develop. Thus, a delayed reaction suggests that only the external signs of an allergy do not immediately appear, and not the disease itself.
Immediate reactions can be expressed by bronchial asthma, dermatitis, urticaria, hay fever, rhinitis, serum sickness, anaphylactic shock, conjunctivitis, Quincke's edema. In practice, often the signs of allergy appear not one at a time, but several at once. For example, hay fever often accompanies urticaria. Diathesis, sneezing and runny nose are the most common signs of allergies in children, which are also almost always detected at the same time. Among the especially dangerous reactions of an immediate type, Kvnike's edema can be noted. In most cases, it occurs after being bitten by a bee, wasp, or some other insect. If Quincke's edema affects the face, occipital region and neck region, then the victim may experience fatal choking.
It is advisable to eliminate any of the reactions of an immediate type as quickly as possible. As for Quincke's edema, measures to eliminate it should be considered truly urgent. From the number of delayed allergic manifestations, a separate item should be allocated a group of cytotoxic reactions. This type of allergy is especially dangerous, because as a result of these reactions, blood cells begin to break down, which, in turn, can lead to hemolytic anemia or leukopenia. Cytotoxic reactions are difficult to diagnose. This is explained by the fact that in most cases people do not compare the appearance of new bruises on the body and hemorrhage of the vessels of the eyes with the possible use of food or drug allergens.
Speaking about various signs of the development of allergies, one can not stop in more detail on the description of a disease such as bronchial asthma. This is a chronic respiratory disease characterized by their increased irritability and sensitivity. Symptoms of bronchial asthma are expressed by attacks of suffocation, which are accompanied by coughing and loud wheezing. It should be noted that most often these are the signs of allergies to cats or other pets. Therefore, in order to prevent exacerbations of bronchial asthma, it is best to simply avoid contact with allergens.