Sitting for a while buttock pain, may be due to the following reasons: 1, may be due to the soft tissues around the sciatica nodule by excessive extrusion and produce, often seen in thin patients. At this time, the sciatic nodes tend to appear particularly prominent, if long time sitting and standing will lead to the soft tissues around the excessive extrusion, and then cause pain. 2, there may be excessive friction or cold in the buttocks. The former is often seen when the patient is sitting or standing, the buttocks often move, resulting in skin rupture around the buttocks. The latter is often caused by cold, resulting in the soft tissues around the buttocks to produce aseptic inflammation, which in turn causes pain. 3, there may be perianal lesions. Some patients, such as suffering from hemorrhoids, in sitting and standing may be hemorrhoids related symptoms, and then cause pain. 4, may be due to the patient’s presence of sciatic tuberosity bursitis and other diseases. The sciatic bursa is located directly below the sciatic tuberosity, and once inflammation occurs in this area, it may cause severe pain here, and there is a significant aggravation when sitting or standing.