There is no strict contraindication to how long a woman can wash her hair after a cesarean section. Under normal circumstances, you can wash your hair after you can get out of bed normally 24 hours after the operation. Cesarean section is a common operation in obstetrics, the surgical technique is very mature, the surgical incision is in the lower abdomen, and the scope of surgery is also small. The incision is made in the lower abdomen and the scope of surgery is small, so there is usually no damage to other body systems. However, because of the need to fasting water before and after the cesarean section, although a small amount of rehydration will be given, but the mother’s physical strength is still poor, usually about 24 hours after the operation to eat, and 24 hours after the operation, the incision pain is obvious, improper activity is also easy to cause incision bleeding, retention of urinary catheter has not yet been removed, inconvenient activities. Therefore, it is not recommended to wash hair during this period. After 24 hours of surgery, if the mother’s mental state and physical condition allow, without fever, dizziness, severe abdominal pain and other symptoms, you can carry out normal washing activities such as washing hair, washing face, brushing teeth and so on. The mother should also pay attention to the magnitude of activities when washing hair, such as standing hair washing difficulties, can be assisted by family members, to take a sitting position or lying down to wash hair, and after washing hair should be timely blow-dried to avoid getting cold.