Acne on the face has different causes depending on the incidence of the population and symptoms. 1. Newborns: Acne on the face of newborns within a few weeks of birth may be neonatal acne, which is mainly affected by the hormone levels of the mother, and may subside on its own as the hormones subside. 2. Infants and children: it may be infantile acne, the appearance of acne is similar to pimples, the top may have white tips; it may also be atopic dermatitis, i.e., there may be pimples, nodules, blisters, or pustules on the face, but its characteristic manifestation is itchy skin, and there may be scratches on the face; if the acne concentrates in the perioral area, then it may be perioral dermatitis. 3. Adolescents: young men and women aged 15 to 30 years old with acne, often accompanied by seborrhea, pores are more obvious, need to consider common acne. The specific situation needs to be analyzed according to the different onset of the population, it is recommended that timely medical treatment, so as not to delay the condition.