The numbness of the big toe, also known as the numbness of the bunion, is mainly due to nerve lesions that cause numbness. Neuropathy is common in the following two cases: 1, perennial diabetes, diabetic foot, the reason is that diabetes leads to capillary lesions at the end of the extremities, blood circulation is poor, and then the local skin sensation is reduced, that is, numbness, clinical is more common in the toes of both feet, to the bunion area is more concentrated. 2, lumbar disc herniation compression nerve, nerve compression time is longer, and then appear The nerve damage, the nerve innervation area of the skin sensation is reduced, that is, numbness. Clinically, a herniated disc in the lumbar fifth sacral region or a herniated disc in the lumbar fourth or fifth vertebra is more common, and the area of the bunion will be numb or have reduced muscle strength.