Wipe the ass pain blood to determine the specific causes, only clear causes can be symptomatic treatment, clinical common causes of blood in the anus have the following causes: 1, anal fissure, also divided into simple anal fissure and old anal fissure, to defecation anal tearing pain, accompanied by a small amount of red blood, mainly after resting the symptoms can be relieved, the treatment of hemorrhoidal ointment to smear the main, to maintain regular defecation, to prevent the dryness of the bowel tearing 2, internal hemorrhoids, internal hemorrhoidal bleeding is more common, internal hemorrhoids in the presence of obvious bleeding points, when defecation to the anal pressure, blood will drip from the anus or spray, through the anal diagnosis can be clear in this case, the treatment needs to be plugged into the hemorrhoidal suppository. If the bleeding is more, you can also take oral hemostatic drugs or directly consider surgery, but the internal hemorrhoids with pain symptoms are less, clinically to identify clear and timely diagnosis.