Do you know when you get a muscle twicth or you eye twitches involentry really fast? well thats what it feels like just inside my anus no pain or owt

Anal spasm: Muscle spasm is common. Anal sphincter spasm is common. Duration should be 10-20 seconds and without significant pain. At times stress, hemorrhoids, constipation or diarrhea, infections, polyps tumors within anal-rectal are may be a cause. Drink plenty of water, focus on increased dietary fibers, avoid caffeine, and alcohol. Minimize stress, get some regular exercise. Not better get an evaluation.