Infant perianal skin need to identify the cause, may be physiological, may also be pathological; physiological causes need to diligently change diapers, pathologically caused by the need for targeted treatment under the guidance of a doctor, such as drug therapy. 1. physiological: consider the baby’s bowel movements, and parents did not change the diaper in a timely manner, thus recurring friction caused. At this time, parents need to pay attention to the baby diligently change diapers, keep the anal area clean and hygienic, wipe with a clean towel. 2. Pathologic: (1) such as trauma, friction, man-made fibers, local environment of hot and humid or dry, dust mites and other causes of anal eczema, considered dry-type lesions, manifested as light red or dark red patches, can be seen in dense small pimples, dry skin, skin surface covered with scales. It is generally recommended to use zinc oxide ointment, as well as glucocorticoid ointment. (2) Contact dermatitis caused by skin contact with certain exogenous substances, mainly manifested as erythema, edema, vesicles and so on. Glucocorticoid ointment, mupirocin ointment can be used externally. (3) If the perianal skin is broken, and there is purulent discharge, accompanied by skin redness and swelling, touching the skin is hot, and the baby cries, it is considered to be perianal abscess, and it is recommended to give antibiotics and anti-infection treatment as soon as possible. In addition to the above reasons, but do not rule out that there are other factors caused by, when diligent change of diapers can not be relieved, you should take the baby to the doctor in time to see the doctor to give targeted treatment. As the baby’s skin is relatively delicate, parents should not blindly give drugs on their own, so as not to aggravate the condition.