What causes scratch urticaria

After the onset of scratch urticaria, people will feel very uncomfortable. If it is not treated in time, many complications will occur, causing great harm to the patient's body. Therefore, the treatment of the disease is very critical, and the cause of scratch urticaria can be understood before treatment.

1. The internal cause of excisional urticaria is the allergic constitution. The most common allergens causing excisional urticaria are drugs, especially penicillin, serum preparations, as well as bacteria, fungi, plant proteins, animal proteins, etc.

2. Many people ignore the treatment of tinea pedis. You should know that the metabolites of various fungi that cause tinea pedis often act as strong allergens. After being absorbed by the body, an antigen-antibody reaction will occur, which will result in the body developing scratch urticaria.

3. To cure scratch urticaria, of course, you must first eliminate allergens, conduct antibacterial and antifungal treatment, avoid drug allergies, and avoid eating fish, shrimp, and shellfish. You also need to change your allergic constitution.

4. There are also many external factors. Including diet, inhaled substances, climate, contact with allergens and other factors. It is the most common cause of excisional urticaria. Due to such complex reasons, scratch urticaria recurs due to the interweaving of numerous causes and inducing factors.

Scratch urticaria is an allergic reaction of the skin blood vessels. The formation of the allergic reaction is caused by the combined action of internal and external factors. There is a special protein in the serum of such patients, which is immunoglobulin IgE. If this protein combines with allergens, the body will cause a series of reactions, which will eventually lead to the mast cells around the blood vessels in the skin releasing a large amount of histamine. Histamine will cause the skin blood vessels to dilate, and serum will seep out of the blood vessels, causing itching. At this point the skin scratch test is positive.