Human helminth mites, also known as lipid mites or hair follicles, are small parasites that are permanently parasitic in the hair follicles and sebaceous glands of human skin, with sites limited to the face, neck and chest, especially in the forehead, cheeks and nose. However, due to individual differences, such as oily skin, which affects the living environment of follicles, the worms multiply and swell the sebaceous glands, and the metabolites and dead worms stimulate the local skin to produce inflammatory reactions, which we call follicular worm dermatitis. The common types of follicular worm dermatitis are rosacea, acne, pustular, hyperpigmentation, and pityriasis. If the facial skin is oily, with persistent erythema, papules, pustules and desquamation, and dilated skin follicle mouth and capillaries, you should go to the hospital, and if a certain number of follicular worms are detected, the diagnosis of medication can be confirmed. However, in the process of medication, you should not try to kill all the hair follicles once and for all and the dosage is excessive, this can only be half the effort and counterproductive. From the microecological point of view, it is also unnecessary and not easy to do. The treatment should start from the cause of the disease, and “mite removal” should be carried out under the guidance of a doctor. The first thing is to inhibit the excessive secretion of sebaceous glands, dissolve the excessive keratinization of the follicle funnel, so that the follicle mouth “nutrition” is reduced, creating an environment unfavorable to the growth of follicle worms, such as the use of isotretinoin has such a role; secondly, do not casually use steroid hormone topical, improve the immune function of facial skin, so that follicle worms can not multiply, so as to Improve the skin symptoms, for some patients with serious conditions and then add insecticidal drugs, such as oral metronidazole tablets or clearing heat and detoxification of Chinese herbal medicine such as bitter ginseng, bupleurum, hawthorn, scutellaria, etc., external use of sinking sulfur, benzoyl peroxide, or Chinese herbal soap pods for external washing. At the same time, you should develop good hygiene habits, wash your face with warm water frequently, and pay attention to keeping your facial skin clean. The use of topical medication should not be excessive, evenly and thinly applied to the face, once or twice a day can be. In terms of dietary habits, avoid spicy and oily products, which may cause abnormal secretion of sebaceous glands and aggravate the condition.