Numbness in the hands during breastfeeding is mainly caused by nerve pressure. A, seen in patients with cervical spondylosis before pregnancy and childbirth, in the postpartum period, if the sleeping position is poor or the neck is cold, after sleeping on a pillow too high, it is easy to lead to pressure on the nerve roots of the neck, which will cause the symptoms of arm and hand numbness. Second, see the body pressure, because in the postpartum breastfeeding, the general maternal like to lie on the side of breastfeeding, and this situation will lead to one side of the arm pressed under the body, will cause the arm part of the nerve, vascular pressure, thus causing poor circulation, but also easily lead to the appearance of hand numbness symptoms. But this situation after changing position, the symptoms of hand numbness will be restored within a period of time.