The redness and acne on the face may be caused by contact dermatitis, hormone-dependent dermatitis and rosacea, which can be treated with medication according to the different diseases. 1. Contact dermatitis: caused by facial skin contact with irritants, the lesions can be subacute at the beginning, manifested as mild erythema, papules, border is not clear. If you are allergic to certain cosmetics, these symptoms can also occur, you should immediately stop contact with suspected allergens, avoid scratching, you can use antihistamines under the guidance of a doctor, such as loratadine. 2. Hormone-dependent dermatitis: commonly caused by the use of hormone creams or skin care products, in addition to the redness of the face, acne, but also capillary dilation, itching, and pustules and other symptoms, can be used under the guidance of a doctor with hydroxychloroquine sulfate tablets and other drugs. 3. Rosacea: Papular pustular rosacea can appear on the basis of erythema with pinpoint to mung bean-sized rashes and pustules. Topical azelaic acid or calcium-modulated phosphatase inhibitors such as pimecrolimus can be used. The causes of redness and pimples on the face are many, it is recommended to consult a doctor in time to identify the cause of the disease, under the guidance of the doctor reasonable use of medication.