There are many reasons for numbness in the thighs, which may be caused by damage to local nerves, especially inflammatory diseases of the nerves of the outer thighs, which can easily lead to nerve damage and abnormal sensation. It may also be due to the patient’s legs catching cold, which will cause poor blood circulation in the muscles, resulting in numbness. It is recommended that the patient pay more attention to the warmth of the legs in life, and at the same time, do some massage to relieve the symptoms of numbness. But there may also be due to the lumbar intervertebral disc herniation, resulting in compression of the nerve caused by the numbness. For example, if a patient suffers from lumbar disc herniation in the 3-4 lumbar vertebrae, due to the protrusion of the nucleus pulposus, which stimulates the nerve root, it will lead to numbness in the innervated area and the skin on the outside of the thighs, and at the same time there will also be a decrease in the strength of the muscles, etc. Therefore, don’t be sedentary for a long period of time, and take proper exercise to promote blood circulation, usually sleep on a hard board bed, and pay attention to the lumbar warmth, and go to the hospital and do a lumbar ct examination to confirm whether it is lumbar disc herniation. You can go to the hospital to do a lumbar CT examination to confirm whether the lumbar intervertebral disc is herniated.