Facial oil and redness may be a physiological phenomenon, or it may be a symptom caused by seborrheic dermatitis. 1. Physiological phenomenon: Part of the population for oily and sensitive skin, this part of the population of the facial oil is mainly due to the facial sebaceous glands secrete too much oil, and sensitive skin patients with thin skin stratum corneum, capillary congestion, so the face love redness. 2. Seborrheic dermatitis: Seborrheic dermatitis is a common chronic inflammatory skin disease that occurs in areas of the body where sebum secretion is strong, such as the head and face. Usually the affected skin will have itching, erythema, present greasy red, can be manifested as facial oil redness. If the patient feels that his face is oily and red, he can go to the dermatology department of the regular hospital, and the doctor will observe the symptoms of the skin, make a clear diagnosis and then carry out the treatment, and pay attention to the cleaning and moisturizing of the face in daily life, and follow the doctor’s instructions to use the medication.