The right side of the buttocks connected to the leg tendon pain, this is called lower extremity radiating pain, is sciatica. Sciatica is most commonly associated with lumbar disc herniation, in which the protruding disc compresses the nerve root, resulting in radicular pain in the nerve root, which is also referred to as pain in the buttocks and hamstrings of the leg, either from the buttocks to the heels, or from the buttocks to the calves, which is the main clinical manifestation of sciatica. Diagnosis can be confirmed through physical examination and auxiliary examination, which mainly depends on whether the straight leg raising test is positive, whether there is any decrease in leg sensation and whether there is any decrease in muscle strength; auxiliary examination mainly depends on the lumbar CT or magnetic resonance, which is able to see the herniation of intervertebral discs and compression of the nerve roots. The treatment of lumbar disc herniation is mainly conservative treatment, conservative treatment includes bed rest, lumbar hot compresses and other physical therapy, application of drugs to reduce swelling and nutrient nerves. If the effect of prolonged conservative treatment is not good, more than 4-6 months is still not good, you can consider surgical treatment. In addition, can cause sciatica, there is the pyriformis syndrome. Piriformis syndrome is the compression of the outlet of the sciatic nerve in the buttocks, and its treatment requires physical therapy, rest; swelling, nutritive drugs, and if it is not good for a long period of time, it can be carried out to release the outlet of the piriformis muscle.