A lot of acne after pregnancy is mostly due to endocrine changes. It is recommended to clean the skin and eat a light diet during pregnancy, which can reduce the production of acne, or apply ointment on the acne to promote subsidence. After pregnancy, endocrine changes in the body and increased secretion of sebaceous glands can induce acne formation. Cosmetics or skin care products with heavy texture and acne-causing ingredients should be avoided on a daily basis. Keep your skin clean and wash reasonably to avoid accumulation of sebum on the skin surface. Regularize your routine and avoid staying up late. For acne that has already formed, the main focus is on localized treatment. If necessary, you can use drugs such as azelaic acid under the guidance of a doctor, because the use of drugs during pregnancy need to consider the safety, so if not necessary, it is recommended to daily regimen. Acne during pregnancy is recommended to go to the dermatology department of the regular hospital, under the guidance of the doctor to use medication and treatment.