Rosacea is an inflammatory skin disease, and redness is a skin symptom. Rosacea can exhibit capillary dilatation, which is a symptom of redness. Rosacea occurs in the middle of the face, and it is currently believed that the onset of the disease is related to genetics, skin immune disorders, etc. The lesions mainly involve skin blood vessels and sebaceous glands, manifesting symptoms such as flushing of the skin, erythema, capillary dilation, papules, pustules, and thickening of the skin, which need to be treated with metronidazole gel, benzoyl peroxide gel, and other medications in compliance with doctor’s orders. Facial redness is due to long-term use of hormones, skin capillary expansion caused by the destruction of the skin stratum corneum, mainly in the cheek area, manifested as facial flushing, prone to skin allergies, dryness, belongs to a kind of skin symptoms, need to be directed to the cause of the treatment to protect the stratum corneum, strengthen the sunscreen is the main. If the patient can not distinguish the specific cause of skin abnormalities, it is recommended that the patient timely dermatology consultation, evaluation by the doctor’s judgment, standardized treatment under the guidance of the doctor.