The rash on the face is mostly considered to be caused by allergy, viral infection or hormone-dependent dermatitis, which can be judged by different symptoms and corresponding interventions. 1. Allergy: such as eczema, contact dermatitis, etc., are caused by allergy, and the rash is often accompanied by itching, which requires finding the causative cause, removing it in time, and carrying out anti-allergy and anti-inflammatory treatment. You can use topical butyl hydroxy acid cream, mometasone furoate cream, zinc oxide ointment, etc., and take oral anti-allergy drugs such as loratadine or paracetamol; 2. Viral infection: this condition causes a rash that may be accompanied by fever, fever over 38.5 ℃ need to give antipyretic treatment, and at the same time must ensure adequate sleep, light diet, and strengthen the patient’s constitution. Virus-induced rashes are self-limiting and can generally return to normal on their own. In serious cases, antiviral treatment can be carried out under the guidance of a doctor; 3. Hormone-dependent dermatitis: In clinical treatment, oral medication can be used for anti-allergy and anti-inflammatory treatment, topical tacrolimus ointment or pimecrolimus cream is used topically, while the skin barrier function needs to be repaired. Daily life should pay attention to facial cleanliness, use warm water, avoid using irritating cleansing creams, skin care products, cosmetics; at the same time, pay attention to a light diet, drink more water, avoid eating spicy and irritating food, etc.