What are the causes of chronic urticaria?

The causes of chronic urticaria include food additives, mental factors, systemic diseases, etc. The specific analysis is as follows:

1. Food additives

If the patient is allergic to food additives such as preservatives, artificial pigments, antioxidants, etc., it will lead to skin allergies and cause chronic urticaria.

2. Mental factors

If the patient is in a state of mood swings, mental stress, depression, etc. for a long time, it is also easy to cause chronic urticaria.

3. Systemic diseases

If the patient has diabetes, hyperthyroidism, kidney disease, leukemia and other diseases, the risk of chronic urticaria will be greatly increased.