Mite acne and common acne both have facial erythema, papules, itching performance, but there are many differences, etiology, clinical manifestations, auxiliary examination several aspects are different. The first is the cause of 1, mite acne: there are two main types of mites, one is the direct invasion of the skin, stimulating the skin inflammatory reaction, causing acne. The other is that mites cause a metamorphic reaction, i.e., mite dermatitis, which manifests as acne. 2, common acne: generally refers to common acne, which is a very common inflammatory disease of the sebaceous glands of hair follicles in dermatology, mainly related to abnormal androgen levels in the body, sebum secretion in large quantities, abnormal keratinization around hair follicles, and Propionibacterium acnes infection, commonly found in adolescents, i.e., “acne “. Clinical manifestations 1. Mite acne: paroxysmal flushing and persistent erythema mainly in the center of the face, especially in the perinasal area producing obvious erythema as well as pustules, intense local itching, aggravated at night, with irregularly distributed edematous erythema, papules, and possibly wind clusters; 2. Common acne: a red, raised rash, usually accompanied by elevated skin temperature and pain, if the inflammation is more severe, manifesting as pustules, which may be accompanied by severe pain. Third, auxiliary examination 1, mite acne: take the contents of the hair follicle under the microscope, can be found mites, fluorescent staining than ordinary microscopic detection rate; 2, ordinary acne: can do dermoscopy, can observe the growth of pores, whether suffering from inflammation. For specific groups of women, if they have irregular menstruation or endocrine disorders, the measurement of sex hormone six and gynecologic ultrasound is beneficial to clarify whether acne is caused by hyperandrogenemia.