I am allergic. I'm covered in mosquito bites. What is the reason?

The causes of allergies can be roughly divided into external and internal causes: the external cause you suspect is related to your drinking and eating disorder. If the rash does not continue to expand, most of them will heal themselves in 1-2 days. If it continues to expand, itching will be more serious. Seek medical attention, infusion or medication as soon as possible.

1 Internal cause: Allergic constitution refers to the fact that the immune system of a certain group of people is defective, and its immune system is different from that of ordinary people, and it is easy to make the action of "attacking without distinction between the enemy and the enemy", which leads to the occurrence of allergies. Most patients with allergic diseases are hereditary. If both parents have allergic diseases, 75% of their offspring may have allergic diseases, and 50% of them occur in the first five years after birth. With the increase of age, the incidence of allergies will gradually decrease.

External cause: Some substances will cause abnormal reaction of some people's immune system after entering the human body. These substances are called "allergens" and are the chief culprit of allergies. Allergens are mostly macromolecular substances, such as some protein or peptides. Common allergens include food (wheat, peanuts, soybeans, nuts, milk, eggs, fish and crustaceans, and allergic diseases caused by food allergies account for about 90% of the total number of allergies) and inhaled substances (pollen, house dust, mites, etc.). ), microorganisms (mold, bacteria, etc. ) and insect toxins and drugs. These substances can enter the body through ingestion, inhalation, contact and injection. Macromolecules can be directly used as antigens, and small molecules (haptens) can combine with some substances in the body to form new antigens (allergens). Allergens will cause sensitization after entering the body for the first time, and allergic reactions will occur when these substances enter the body again. Stimulate the abnormal activity of the patient's immune system, and eventually cause a series of allergic injuries.