Sciatica is a very common disease that should be of great concern to everyone, especially to be familiar with the symptoms of sciatica, so that the disease can be treated in a timely manner and improve the effectiveness of patient treatment. So, what are the specific clinical manifestations of sciatica? What are the specific clinical manifestations of sciatica? 1. Symptoms of dry sciatica: The urgency of the onset of the disease varies with the cause. If induced by cold or trauma, the onset is more acute. Pain often radiates from the buttocks to the posterior femur, posterior lateral calf and lateral foot. The pain increases with walking, activity and traction on the sciatic nerve. The pressure point is below the gluteal point, and the Lasegue sign is positive while the Kernig sign is mostly negative. The crestal scoliosis is mostly bent to the affected side to reduce the strain on the sciatic nerve trunk. 2. Symptoms of radicular sciatica: Pain often radiates from the lumbar region to one side of the hip, posterior thigh, popliteal fossa, lateral calf and foot, with burning or cutting-like pain, which may increase with coughing and exertion, and is worse at night. Symptoms of sciatica may include pressure pain, such as the parietal point, hip point, popliteal point, ankle point and metatarsal point. There is often numbness and hypoesthesia in the lateral calf and dorsum of the foot of the affected limb. The gluteal muscle tone is relaxed and the thumb extension and flexion muscles are weakened. The Achilles tendon reflex is weakened or absent. What are the specific methods of sciatica prevention 1. Sitting posture: The correct sitting posture is to sit with the upper body straight, abdomen tucked in, jaw slightly tucked, and both lower limbs together. If possible, it is best to put a foot or footstool under both feet so that the knee joint is slightly higher than the hip. If you sit on a chair with a backrest, it should be in the above posture on the basis of the back as close as possible and lean on the back of the chair, so that the lumbosacral muscles are not too fatigued. In addition, should not sit below 20cm low stool, should sit on a chair with a backrest, which can bear part of the weight of the torso, so that the lumbar back is relatively in a relaxed state, reducing the chance of lumbar back strain injury. 2, standing posture: the correct standing posture is slightly bent knees, natural abdomen, chest up, so that the body’s center of gravity from the mastoid process behind the ears down through the central transverse axis of the hip joint, the front of the second sacrum, to the front of the knee joint and ankle joint, falling on the weight-bearing foot. At this time the body’s gravity line just through the lumbar vertebral body or the rear of the intervertebral disc, can effectively prevent the nucleus pulposus from protruding again. Poor standing posture, especially the crest is not correct, will cause uneven force on the intervertebral disc, is the hidden root cause of disc protrusion (expansion). The correct standing posture should be two eyes flat, jaw slightly inward, chest up, waist straight, calves slightly closed, two legs upright, the distance between the two feet is about the same as the width of the pelvis, so that the entire pelvis will be tilted forward, so that the whole body gravity evenly from the crest, pelvis to the lower limbs, and then from the two lower limbs to the foot, in order to become a real “feet on the ground” . At this time, the human body’s gravity line just through the lumbar vertebrae or the rear part of the intervertebral disc, can effectively prevent the nucleus pulposus subprotrusion.