There are many causes of rashes on the face, including acne, eczema, flat warts, hormone dependent dermatitis, etc. It is necessary to go to the hospital in time to be diagnosed by a doctor to clarify the cause and treatment. 1, acne: mostly occurs in people with high sebum secretion, in the face such as forehead, nose, chin and other places prone to oil, such as face cleaning is not in place, will make excess oil mixed with dust or dander, etc., on the surface of the skin The clinical manifestations include erythema, papules, pustules, etc.; 5, other: if the rash is accompanied by fever and other symptoms, it may be a viral infection resulting in rubella, measles or other infectious diseases, which requires a blood test at the hospital to determine the cause of the disease and then treated.