There are several possible causes of anal itching at night: first, it may be caused by eczema of the skin around the anus, which generally has local eczema-like changes. Second, anal itching may also be due to inattention to personal hygiene, or sweating more in the summer, and itching symptoms are more obvious at night when people are quiet. The third, anal itching may also be caused by acromegaly, usually accompanied by the formation of local skin redundancies, and a history of unclean sexual intercourse. The fourth, anal itching may be caused by hemorrhoids, especially the more serious hemorrhoids, anal swelling protruding when not easy to wipe the stool clean, can lead to some secretions residue, stimulating the perianal skin, thus causing itching. If you find anal itching at night, what exactly is going on, it is recommended to go to a regular specialist hospital for systematic examination in time to make a clear diagnosis.