What is the cause of papular urticaria?

The main cause of papular urticaria is allergy caused by insect bites, including mosquitoes, bedbugs, mites, fleas, etc., with mites being the most common. Therefore, in the current popular science and teaching materials, it has been suggested to change the name of this disease to insect bite dermatitis. At present, according to evidence-based medicine and epidemiological analysis, it is supported that more than 9% of the cause of this disease comes from insect bites. In addition, in a few cases, it may be caused by environmental or dietary allergies. After allergy, there will be spindle or spindle papules in the local area, accompanied by itching. If papular urticaria occurs in life, most of them have been to strange places or rarely visited environments before it appears, such as changing a new workplace, moving to a new home, going to a hotel or hotel, going to the park grass, going to a rural area or a place where animals are closed, and papules appear on their bodies, indicating that it is caused by insect bites.