Postpartum hand numbness may be caused by arm fatigue, or complications caused by anesthesia, or it may also be originally suffered from hypokalemia, carpal tunnel syndrome and other diseases. 1. Arm fatigue: for women who have had a normal delivery, it may be due to the fact that in the process of labor, the arm needs to grasp other objects to help develop strength, resulting in excessive arm fatigue, and keeping the same position for a long time, which makes the local blood flow unsmooth, and then it is easy to cause numbness of the hand. 2. Anesthesia Complications: For women who have cesarean section, because of the need for epidural block anesthesia, if the anesthesia process causes damage to the nerve root, the damaged innervated area will experience pain and numbness, so some women will experience numbness. 3. Hypokalemia: The occurrence of this disease is related to factors such as loss of sweat, prolonged partiality or vomiting, and can be induced by older age and high temperature environment. The main symptoms are muscle weakness and muscle pain. Numbness of the limbs, etc. If the mother originally suffered from this disease, a lot of sweating during childbirth, overwork, postpartum is prone to hand numbness symptoms. 4. Carpal Tunnel Syndrome: The occurrence of this disease is related to exogenous compression, smaller lumen of carpal tunnel, and increased contents of the lumen. Since this disease can be induced by excessive hand exertion, some women will have symptoms such as hand numbness, weakness in holding objects and pain after delivery. In clinical practice, it is recommended that women with hand numbness after delivery should cooperate with their doctors to complete the relevant examinations in order to clarify the specific causes.