Mite dermatitis occurs on the skin of the neck, chest, abdomen, back and extremities, with a rash in the form of edematous bright red rash with a small blister in the middle (mite bite marks), which is unbearably itchy, especially at night, causing no peace overnight. The disease mostly occurs in the warm and humid summer and autumn seasons, and the bite is followed by localized itching, especially at night, with persistent and severe itching, localized edematous erythema, papules, papules, and pemphigus, and a central petechiae of insect bites. The rash first occurs on the contact or exposed parts of the body, and later invades the parts covered by clothes, mostly on the neck and trunk, followed by the upper extremities, and less frequently on the face and lower extremities. The rash begins to subside in about 1 week, and the itching is relieved, leaving pigmented patches, often with scratch marks, scabs, eczema-like changes or secondary infections, local lymph node enlargement, and the disease lasts for several days. Patients have increased leukocytes and eosinophils, and individual patients may develop proteinuria, conjunctival congestion, and asthma. Diagnosis of mite dermatitis: After contact with cereal weeds in the warm and humid season, pruritic edematous erythema occurs first in the exposed area, and the disease can be controlled more quickly after stopping contact with pollutants, and it is not difficult to diagnose according to its characteristics, and the diagnosis of the disease can be confirmed if insects are found on the contact and host body. The disease should be distinguished from the following diseases: 1, papular urticaria: the rash often occurs suddenly, with little relation to the season, not necessarily a history of cereal, weed contact, not easy to detect the worm. 2, scabies: there is a typical site of prevalence, in the finger crevices can often be found scabies mites or insect eggs. 3, chickenpox: the onset is mostly in the spring, mostly in children, there is a history of contact infection, the rash is mainly blisters, there are often pioneer symptoms before the rash, there is no history of cereal, weed contact. Mite dermatitis treatment: Mites can cause irritant dermatitis, allergies and other skin diseases. High summer temperatures and frequent mite activity, coupled with long stays in air-conditioned rooms, use of straw mats, and lack of hygiene add to the mites’ infestation of the skin. Mite treatment is troublesome and sometimes requires a whole summer of persistent treatment to be effective. The medication should be chosen according to the age. For children, some hormones with weak irritation such as dexamethasone cream and Eudragit and some Chinese herbal preparations such as Pippo and Dampiol are available. For adults, stronger drugs such as anti-itch spiritus (compound tincture of menthol), anti-itch lotion, water glycerin spiritus (glycerin tincture of salicylic acid), and dechlorinated double (compound tretinoin acetate ointment) can be used. In addition to medication, attention to the details of life is also an important means of avoiding mite infestation. You need to keep your skin clean every day and wash your blankets and towels regularly. The heat of the sun can kill some of the dust mites. Mattresses, cushions and mats should be dried to the sun for two to three hours from time to time and beaten with a stick. Keep the room ventilated and take down the filter on the air conditioner at least once every 2-3 days to clean the dust and remove the mites at the same time. It is best not to choose a straw mat, generally speaking, with rope, reeds, grass woven into the mat is prone to mites, while the use of bamboo, rattan prepared by the mat is less allergic. Mite dermatitis prevention: 1, daily wipe the mat with warm water after waking up. 2, every year before the collection of mats will be used to remove the mat surface dirt and sweat stains (due to human sebum, skin scales and other things and sweat in the ammonia salt residue on the mat ), clean water to dry, with good air permeability of the paper wrapped storage. 3, summer food should also pay attention to mite infection; such as sugar, honey, etc. are mite cultures, improper storage are prone to mites, easy to cause enteritis, asthma, urticaria (wind pimples ) after eating, so avoid eating damp sugar, blistered honey. If the above foods are mistakenly eaten, in addition to inducing allergic diseases such as the above, they can also make mite dermatitis persistent. 4, when using the clothing and bed linen in the cupboard for a long time during the change of season, they should also be washed and dried before use, which is a key measure to avoid mite dermatitis.