The anal hard lumps may be caused by the following conditions: 1, hemorrhoids, especially external hemorrhoids, acute attacks due to more fibrin exudation in the nucleus of the hemorrhoid, thus forming a solid skin pendulous, so that the skin around the anus appears hard. 2, due to perianal abscess, will appear anal pressure when the touch is hard, and will be accompanied by fever, chills or elevated white blood cells and other symptoms. 3, acromegaly