Rectal pain after sitting for a long time is not normal, it may be caused by proctitis, hemorrhoids, tumors and other diseases. 1. proctitis: the inflammatory reaction of the rectum will cause the rectal mucosa to become congested and swollen, which may lead to the symptom of sitting for a long time with rectal pain. 2. Hemorrhoids: poor circulation around the anus can cause local venous return abnormalities, resulting in venous vascular tortuosity, the formation of hemorrhoids, which may also lead to rectal pain after sitting for a long time. 3. Tumor: benign tumors or malignant tumors of the rectum and other diseases can also cause rectal pain after sitting for a long time. Rectal pain after sitting for a long time, there may be other reasons, you should go to the hospital in time for a detailed examination, to clarify the cause of the disease, as soon as possible to comply with the doctor’s instructions for treatment, to avoid delays in the condition.