Lateral cutaneous nerve of the thigh entrapment syndrome

　　Common causes of pressure:

　　1. The lateral cutaneous nerve of the thigh forms an angle when it exits the pelvis into the thigh, combined with anatomical variations. When the limbs are moved or the posture is incorrect, the nerve is subjected to persistent traction, friction, and compression, causing local tissue edema, scar formation, and thickening of the muscular fascial sheath, leading to nerve entrapment.

　　2. Fractures of the pelvis, tumors, foreign bodies, or plaster compressing the lateral cutaneous nerve of the thigh can cause entrapment.

　　3. Stimulation of the nerve or local scar adhesion compressing the nerve during the surgical removal of the iliac bone.

　　4. Hematomas within the fascia of the iliac腰muscle due to trauma or hemophilia can cause this syndrome.

　　The complications of this disease mainly occur when the compression is severe and prolonged, causing demyelination of nerve fibers, even far-end axon disintegration, and Wallerian degeneration of the myelin sheath. During limb movement, the nerve fibers in the narrow channel are subjected to chronic inflammatory injury under mechanical stimulation, and the edema-ischemia vicious cycle is aggravated. This further causes damage, so patients with this disease should actively seek treatment to prevent the occurrence of complications.

　　The patient complained of numbness in the anterior and lateral thigh, with pricking or burning pain, which worsens during walking and can be relieved by lying in bed. There is tenderness below the anterior superior iliac spine, and the Tinels sign is positive. There is hypoesthesia or hyperesthesia in the anterior and lateral thigh sensation, and the symptoms worsen when the lateral cutaneous nerve of the thigh is stretched during hip extension.

　　To clarify the diagnosis and understand the cause of compression, further X-ray examination of the lumbar spine, pelvis, and hip for bony lesions should be performed, or other diagnostic techniques should be used to exclude tumors, tuberculosis, inflammation, or hemophilia, etc.

　　There is currently no effective preventive measure for this disease. Early detection and early diagnosis are the key to the prevention and treatment of the disease. Strengthen physical exercise, enhance physical fitness, and improve immunity. Participate regularly in physical exercise, such as health exercises, qigong, Tai Chi, doing physical exercises, walking, etc., which is very beneficial. Those who persist in physical exercise are physically strong, have strong disease resistance, and rarely get sick.

　　The patient mainly complains of numbness in the anterior and lateral part of the thigh, with pricking or burning pain, which worsens during walking and can be relieved when lying down and resting. There is tenderness below the anterior superior iliac spine, and the Tinels sign is positive at this location. There is a decrease or hypersensitivity in the sensation of the anterior and lateral part of the thigh. When the hip joint is extended and the lateral cutaneous nerve of the thigh is stretched, the symptoms worsen.

　　X-ray examination can exclude lumbar, pelvic, and hip bony lesions. CT and MRI can exclude tumors, tuberculosis, and inflammation.

　　Patients with lateral cutaneous nerve entrapment syndrome should pay attention to a light diet, eat more vegetables and fruits, and reasonably match their diet. The patient's diet should be light and easy to digest, eat more vegetables and fruits, and reasonably match their diet, paying attention to adequate nutrition. In addition, patients should also pay attention to avoiding spicy, greasy, and cold foods.

　　After clear diagnosis, treatment should be carried out according to different etiologies. If caused by local scar hyperplasia or muscular fascial sheath stenosis, conservative treatment (rest, physiotherapy) is recommended. If ineffective, surgical exploration can be performed to remove the compressive factors, incise the muscular fascial sheath, and excise the scars around the nerves. If the patient's nerves are deformed under pressure or have a hard feeling when touched, or if the pain symptoms are severe, nerve surgery should be performed to relieve the tension.