A small piece of meat in the anus is particularly itchy may be caused by hemorrhoids, acrodermatitis, perianal infection. If the hemorrhoid reaches the middle stage, due to forceful defecation hemorrhoid prolapse, rectal secretion mucus outflow or residual feces irritation to the perianal skin and itchy hemorrhoids, human papilloma virus caused by acromegaly good around the anus, will out small flesh foreign body sensation, itchy, painful as well as painful intercourse, is contagious. Perianal infection will appear as painful, red, swollen and itchy skin around the anus, caused by occlusion of the sweat glands, often secondary with bacterial infection. In addition to the above-mentioned cases, other perianal diseases may also appear a small piece of meat in the anus also particularly itchy, itchy can go to the hospital anorectal or dermatological examination, remove the original disease, the symptoms will be able to relieve.