Stool sitting for a long time may be the body is too thin, bone extrusion caused by, may also be the hip myofasciitis, hemorrhoids, pear-shaped muscle syndrome. 1. body too thin: the first thing to consider is also the most common is not their own body is too thin caused by this case can be in the change of padded stool after the symptoms have been relieved. 2. Gluteal Fasciitis: Generally, it is caused by long-term hip stress, stooping activities or poor posture of the waist and buttocks, and cold stimulation will induce symptoms or aggravation of the stimulus. Clinical manifestations for the waist and hip pain, light and heavy, aggravated by exertion, rest better, repeated episodes. 3. Hemorrhoids: long-term sedentary may also lead to hemorrhoids, for hemorrhoids the site of pain and other pain can be clearly identified, in addition to most of the accompanied by blood in the stool and other symptoms. If there are similar symptoms can not self-diagnose hemorrhoids, the need for specialist outpatient examination, to exclude other diseases. 4. Pearly muscle syndrome: this is due to the sciatic nerve in the buttocks by the pressure caused by the buttocks and lower limbs of the radiating pain, diagnosis of pearly muscle syndrome need to be a specialist doctor’s specialist examination, need to be outpatient clinic to rule out the lumbar intervertebral disc herniation and other problems. There are many reasons for buttock pain after sitting on a stool for a long time, which should be examined and treated under the guidance of a doctor.