The clinical manifestations of lateral femoral dermatomal neuritis are numbness, ankylosis, tingling, burning, chill, decreased sweating, and heaviness in the anterior lateral femur. Lateral femoral cutaneous neuritis, also known as abnormal sensory femoral pain, is not the same disease as lateral femoral cutaneous nerve entrapment syndrome. It is characterized by pain and abnormal sensation in the skin of the anterolateral thigh and is also known as Roth syndrome. Lateral femoral cutaneous neuritis, also known as abnormal sensory femoral pain, Bernhardt’s disease, and Roth’s disease, is a disease of abnormal sensation in the skin of the lateral femur. The lateral femoral cutaneous nerve extends from the outer edge of the psoas major muscle and enters the subcutaneous tissue 3 to 5 cm below the inguinal ligament. Differential diagnosis of anterolateral femoral numbness and ankylosis: numbness of the gastrocnemius muscle occurs during walking: a large muscle in the superficial layer at the back of the calf, commonly known as the calf stomach. The lower end of the muscle forms a tough heel gyrus linked to the heel bone, which plays an important role in human uprightness and walking. Numbness in the extremities: numbness in the extremities is a symptom that often occurs in people’s daily lives, such as pregnancy, incorrect sleeping position, squatting in the toilet for a long time can be triggered, will generally be eliminated in a short period of time, there will be no major problems. Numbness in the hands and feet of healthy people, mostly occurs after a long time in a posture or limbs under pressure. This kind of numbness rarely more than ten minutes, and can disappear quickly, and is not accompanied by other symptoms. It is mostly seen in obese men aged 20 to 50. The symptoms are numbness, ankylosis, tingling, burning sensation, chill, reduced sweating and heaviness in the front and lateral femur, with numbness being the most common. The symptoms may increase with physical exertion and prolonged standing, and may be relieved after rest. On physical examination, there may be varying degrees of superficial sensory loss or absence, mainly pain and temperature sensation is reduced while pressure sensation exists. The disease is often unilateral, chronic in course, sometimes mild and sometimes severe, and often does not heal for months to years. This disease can be considered.