urticaria allergen

Urticaria causes more complex, most patients can not find the exact cause, common causes of urticaria include food, such as high protein food, such as fish, shrimp, crab, beef, mutton, etc., as well as some plants, food additives, etc., as well as infections, such as hepatitis virus, coxsackie virus, streptococci, fungi, parasites, etc., as well as drugs, such as penicillin antibiotics, serum preparations, various vaccines, etc., and respiratory tract inhalants, such as pollen, Household dust mites, skin contacts, such as animal dander, hair, etc., also include some physical factors, such as cold, heat, sunlight, friction, and pressure, mental and endocrine factors and genetic factors, etc., can also induce urticaria. Some systemic diseases, such as systemic lupus erythematosus, malignant tumors, endocrine disorders, ulcerative colitis, etc., can also be associated with urticaria. Therefore, the etiology of urticaria is complex, and it is difficult to find specific allergens exactly. A certain patient may be caused by one factor or by multiple factors, but it is still necessary to try to find allergens when treating.