Lesions in the sacroiliac joint will mainly lead to compression of the sciatic nerve of the organism, which will lead to symptoms, including localized pain, sensory abnormalities, and muscle strength disorders. 1. Localized pain: the areas innervated by the sciatic nerve mainly include the buttocks, the back of the thighs, the back and outside of the calves, and the feet, and when the sacroiliac joints compress the sciatic nerve, it will lead to pain in these areas. The degree of pain may be mild, or manifested as burning pain, tingling, etc., and a heavier degree of radiating pain may also occur. 2. Sensory abnormalities: Due to localized nerve compression, it usually leads to sensory abnormalities such as numbness and tingling sensation in the legs. 3. Muscle strength disorder: If the nerve is compressed for a long time, it may lead to the weakening of muscle strength, resulting in weakness of the leg, weakness of the foot, weakness of walking and so on. It is recommended to consult the doctor in time after the corresponding symptoms appear, and then actively treat the cause of the disease.