Possible causes of redness include impaired skin barrier function, rosacea, and systemic lupus erythematosus, which can be recovered through enhanced care and medication. 1. Impaired skin barrier function: When the facial skin barrier function is impaired, it can also lead to redness, often accompanied by symptoms such as dryness, peeling and tingling of the face. Such patients should pay attention to gentle cleansing, skin care, and strengthen the measures of sunscreen when going out, and when the symptoms are serious, they can be topically applied to recombinant human epidermal growth factor gel and other medications to help treat the disease. 2. Rosacea: Persistent facial erythema and capillary dilatation are the typical manifestations of rosacea, and severe patients can also be accompanied by facial pinpoint to mung bean-sized papules and pimples, etc. Such patients can improve their symptoms by applying topical tacrolimus ointment and other medications, and severe cases need to take oral minocycline and other medications to help treat the symptoms at the same time. 3. Systemic lupus erythematosus: patients with systemic lupus erythematosus will have the characteristic butterfly-shaped erythema on the face, accompanied by varying degrees of joint swelling and pain, visceral damage and other symptoms, such patients need to take glucocorticoid drugs (eg, prednisone), immunosuppressants (eg, cyclophosphamide, azathioprine) and other medications, so as to alleviate redness of the face. Redness of the face may also have other causes, recovery methods are more, it is recommended to go to the hospital in time, clear cause of the disease under the guidance of the doctor’s treatment.