Small bumps around the anus: 1, because of the usual time do not pay attention to the hygienic habits of the anal area, or often eat spicy, irritating things, resulting in inflammatory hyperplasia near the perianal area. 2, because of the causes of bacterial and viral infection around the anus, these bacteria and viruses will continue to multiply around the anus, thus destroying the normal skin around the anus, resulting in abnormal proliferation of perianal cells caused by this phenomenon. 3, The reason for the perianal eczema is mainly because usually long do, life is more stressful, too obese, body sweating regularly, good through tight rough clothes, resulting in the perianal skin constantly friction, moist, thus appearing itchy and uneven bumps. 4, because of the perianal acral warts, hpv virus constantly erosion, the formation of one after another maculopapular rash. 5, because the perianal polyps caused by the cause The actual fact is that if you have hemorrhoids or perianal abscesses and other diseases will also cause this condition.