Numbness of the outer thigh like a worm may be caused by physiological factors such as localized excessive pressure, and may also be caused by high lumbar disc herniation, lateral femoral dermatitis, etc. Numbness of the lateral thighs like bugs may be caused by physiological factors such as poor blood circulation due to localized excessive pressure. High lumbar disc herniation, caused by its compression of the corresponding nerve roots, is usually accompanied by pain and discomfort in the lower back, which can be clearly diagnosed by lumbar spine CT and MRI, and accompanied by pain and discomfort in the lower limbs. Lateral femoral cutaneous neuritis, mostly caused by trauma or strain injury to the lateral femoral cutaneous nerve damage, numbness is usually located in the front lateral thigh. If there is repeated numbness of the lateral thighs like a bug, you need to go to the hospital in time to diagnose and treat the cause of the disease.