There are many causes of numbness in the lateral thigh muscles, the common causes are mainly the following: 1, lumbar disc herniation, the disease is one of the common diseases that cause numbness in the lower limbs, serious lumbar spine disorders can compress the sciatic nerve, so that the symptoms of numbness in the lower limbs. The diagnosis can be clarified by perfecting the lumbar spine examination, and the treatment can be improved by means of traditional Chinese medicine physiotherapy. 2, diabetic peripheral neuropathy, one of the common complications of diabetes. Not only will it cause symptoms of numbness in the thighs, but also abnormal sensation in severe cases. First of all, it is necessary to control the blood sugar smoothly. Second, the application of nerve-nourishing drugs such as adenosine cobalamin, methylcobalamin, etc. 3, cerebrovascular disease, such as cerebral infarction can cause brain dysfunction, which will have numbness of the limbs, activity disorders, swallowing difficulties and other symptoms, can take anti-platelet aggregation or anticoagulant drugs for treatment.