Internal anal distension is mainly seen clinically in the following cases: i. Perianal abscesses, which are especially high and deep, are not painful because they are far from the skin. However, due to the multiplication of bacteria, which develop too quickly in the abscess cavity, local swelling and pain and downward sensation are more common in submucosal abscesses. This situation is not treated by medication, anti-inflammatory drugs if not controlled, but delay the progress of treatment, it is recommended that direct surgical incision to drain the pus. Second, anal sinusitis, anal sinusitis is also a more common clinical cause of intra-anal swelling and pain, accompanied by a little secretion, in the anoscope can be seen in the anal sinus reddened, obviously concave mainly. The treatment can be inserted into the hemorrhoid suppositories or anti-inflammatory suppositories, if the effect is not good, but also directly under the surgery to perform anal sinusotomy, clinical to confirm the diagnosis according to the specific performance and related examination.