Symptoms of sacral 1 nerve root compression include lumbar pain, localized pain in the lower limbs, numbness, and loss of muscle strength in the lower limbs. 1. Lumbar pain: Sacral 1 nerve root compression is mainly caused by lumbar disc herniation, which is usually accompanied by compression of the nerves around the lumbar discs, resulting in lumbar pain. 2. Localized pain and numbness in the lower limbs: pain in the lumbar region may radiate to the lower limbs locally, such as the back of the buttocks, the back of the thighs, the back of the calves, the soles of the feet, the outside of the dorsum of the feet and other parts of the foot, and the pain may be like burning, and sometimes accompanied by numbness, and even hyperalgesia may occur. 3. Decreased muscle strength of lower limbs: If the local nerve compression is more serious, it will also cause decreased or even disappeared muscle strength of the legs, such as decreased power to stir up the ground with the feet, etc. Decreased reflexes of the Achilles tendon may also occur, which will lead to difficulty in walking. Sacral 1 nerve root compression may also appear some other symptoms, if the above symptoms occur, it is recommended to go to the hospital in time to complete the relevant examinations, after a clear diagnosis and standardized treatment as prescribed by the doctor, so as not to delay the condition.