Anal pain while sitting can be caused by anal fissure, hemorrhoids, perianal abscess, anal boil and other diseases. 1. Anal fissure: due to constipation, bowel dryness and other reasons, resulting in anal skin tearing, the formation of small ulcers produce severe pain, there can be blood in the stool, stool, after the anal part of the intense pain, get up and sit down will also be painful. 2. hemorrhoids: is due to varicose veins in the lower rectum, external hemorrhoids or mixed hemorrhoids anal pain, especially when the external hemorrhoids thrombosis, that is, thrombosed external hemorrhoids, there can be a dark purple mass next to the anus, the pain is obvious when sitting. 3. Perianal abscess: due to anal gland obstruction combined with bacterial infection, common staphylococcus aureus, acute purulent inflammation around the anus can occur, which can be manifested as swelling and pain around the anus in sitting position. 4. Anal boils: due to the anal skin follicles such as Staphylococcus aureus and other infections, when sitting due to the boil pressure and pain. If you have anal pain while sitting, you must consult a doctor in time and follow the doctor’s instructions to find out the cause and give treatment in time so as not to delay the condition.