1. Intermittent stabbing pain, sometimes with a burning sensation or foreign body sensation, occurs during an attack of anal sinusitis. Sometimes the pain is persistent in the anal area, and the pain is aggravated by the pressure on the anal sinus during defecation, sometimes spreading to the buttocks and the back of the femur. 2.Inflammatory stimulation leads to anal swelling or incomplete defecation and other sensations. 3.Sometimes there may be a little mucus flowing out before the stool, or a small amount of blood mixed in the stool. 4.Anal dampness and itching.