Mites belong to the phylum Arthropoda, Arachnida, and subclass Ixodes, a group of tiny animals with a body size of about 0.5mm, generally invisible to the naked eye. The medical profession has long found that mites and human health is very close, such as common scabies mite, worm mite, pink mite, dust mite, etc. can be parasitic in human skin or in the air of the surrounding environment to cause rosacea, eczema, hives, scabies and other skin diseases, nasopharyngitis, conjunctivitis, asthma, etc., seriously endanger human health, affecting people’s normal work and life. Scabies mite adult body is nearly round or oval, the back is elevated, creamy white or light yellow. The size of the female mite is 0.3-0.5×0.25-0.4mm; the male mite is 0.2-0.3×0.15-0.2mm. The jaws are short and located in the front. The chelicerae are pincer-like and have small teeth at the tip. Scabies mites are often parasitic in the finger crevices and other soft, tender skin deep in the epidermal stratum corneum, feeding on keratinous protein tissue and lymphatic fluid, and digging with chelicerae and front tarsal claws, gradually forming a winding tunnel parallel to the skin. The tunnels are up to 10-15 mm long, with female mites digging the longest tunnels, with small longitudinal channels leading to the epidermis at regular intervals. The blind end of the tunnel often has the insect body hidden, and is a pinpoint size grayish white dots. Intense itching is the most prominent symptom of scabies, causing itching is caused by the mechanical stimulation of female mites digging tunnels at night and the role of excretions and secretions produced in life, caused by allergic reactions. Random daytime itching is lighter and intensifies at night, more so after sleep. The lesions of the parasitic site of the scabies mite are small papules, papules and tunnels, and are mostly symmetrically distributed. The papules are light red, pinhead-sized, sparsely distributed or densely clustered, but not fused. Due to prolonged severe itching and scratching, secondary infections can occur with impetigo, folliculitis or boils. The activity, lifespan and ability of infection of adult worms after leaving the human body are related to the temperature and relative humidity of the environment they are in. Longer life span is achieved at lower temperatures and higher humidity, while high temperatures and low humidity are detrimental to their survival. The most suitable temperature for female mites to spread is 15-31°C, and the effective time limit for spreading is 1-6.95 days, within which the activity is normal and has the ability to infect. It is worth mentioning that more and more families keep pets, and it is very easy to cause the direct spread of scabies mites to people, and cause the mutual spread of human to human. It is not difficult to make a diagnosis based on the history of this disease, history of close contact and clinical symptoms of people living together. If the scabies mite can be found, the diagnosis can be confirmed. The method of checking the scabies mite is commonly used to pick the end of the tunnel with a sterilized needle tip or the new papules without scratching, and take out the scabies mite; or lightly scrape the local area with a razor blade, and microscopic examination of the scrapings. Now domestic scholars use the dermatoscope to directly examine the lesion site, found to have a tunnel and its blind end of the scabies mite outline, that is, with the tip of the scalpel to pick out the scabies mite, can confirm the diagnosis. Go to the hospital to find a dermatology professional doctor to apply sulfur and other insecticides for diagnosis and treatment. Hair follicle mite also called human worm mite, 0.3 to 0.4 mm long, has a translucent elongated body. It is parasitic in hair follicles and sebaceous glands of human face, such as nose, ears, scalp, forehead, back and ear canal, etc. It is usually detected directly with microscope: squeeze hard from inside the pores of nose or more oily parts, take a bit of sebum, put it on a slide and observe it under microscope. The incidence of mite infection gradually increases with age and sebum secretion, and the highest rate of facial mite infection in adult men and women is 97.68%. It leads to blockage of hair follicle mouth and sebaceous gland mouth, stimulation of keratin layer proliferation, hair follicle expansion, pore enlargement, hair loss and other lesions. Overproduction of sebum leads to oily face. It leads to acne, acne, rosacea and seborrheic dermatitis, eventually forming rough skin, bumpy scar, capillary dilation, etc. It can also accelerate melasma, freckles, age spots and other pigmentation. Therefore, the diet should be light, eat more coarse food, less sweet and spicy greasy to avoid sebum secretion; use more topical cleansers containing sulfur, metronidazole, etc. If the symptoms are serious, go to the hospital to find a professional dermatologist for treatment. Dust mites, dust mites, dust mites, leather mites, chiggers and other mites in the air are widely distributed in humid, high temperature, cotton and linen fabrics or dusty environments, such as dark corners of living rooms, air conditioners, sofas and cushions, carpets, mattresses, pillows, mats, bedding, plush toys, etc. They feed on human sweat, secretions and shed dermal proteins and multiply very fast. The warm and humid environment in spring and summer is the season when mites breed and develop most vigorously, becoming floating objects in the air, and their corpses, secretions and excretions are allergens that can cause allergic dermatitis, allergic rhinopharyngitis, asthma, bronchitis, nephritis and other diseases, seriously endangering human health. Dust mite allergy can be diagnosed by skin prick method, immunoblot blood sampling method, and bioresonance method. So try not to lay carpets in the bedroom, just lay floor tiles or wooden floors. Wipe the floor with a damp mop every day to prevent dust from being raised in the room. Regularly put long-term covered covers, sheets and bedding into hot water at about 60°C and expose them to the sun to kill the mites hiding in them. Choosing an effective air cleaner will help filter out the airborne allergens. Patients with severe symptoms can be seen in dermatology, ophthalmology, respiratory medicine and pediatrics respectively.