What is urticaria caused by

summary

I found a lot of red spots on my back. Recently, there will be pus after scratching. Now my skin is rotten and looks scary. My friends all say that I may have urticaria. Today, let me tell you what causes urticaria.

What is urticaria caused by

Factor 1: urticaria is mast cell dependent and non mast cell dependent inflammatory mediators caused by allergy, autoimmunity, drugs, diet, inhalation, infection, physical stimulation, insect bite and other reasons. Histamine, 5-hydroxytryptamine, kinin and slow reactive substances are released, resulting in vasodilation, increased vascular permeability and inflammatory cell infiltration.

Factor 2: genetic factors. We know that the occurrence of many diseases may be related to heredity. According to the survey, patients with familial angioneurotic edema and familial cold urticaria are more likely to suffer from the disease than normal people.

Factor 3: physical diseases. Some physical diseases may be accompanied by urticaria. If the patient has internal lesions, such as cholecystitis, cholelithiasis, appendicitis, sinusitis, tonsillitis, discordant teeth, lymphoma, visceral tumor, collagen disease, rheumatic fever and other diseases, it may lead to urticaria.

matters needing attention

The cause of measles is complex. At present, it is considered that food causes account for a large part of the causes of the disease, especially acute urticaria, which is often directly related to food. Therefore, patients with urticaria should pay more attention to diet. What urticaria emphasizes is to limit diet, but it should be targeted and reasonably limited.