I have a mind body issue that causes my anal muscles or pelvic muscles to hurt. The pain is like a pressure or ache inside my back passage. It is there constantly but it goes when I'm asleep, or after a few beers or even when I'm completely distracted. It is an obsession and because I suffer from anxiety it makes it hard to focus on anything else. I saw a pelvic floor physical therapist who found the location of the pain. A chronically tight muscle inside the anal canal. It is a subconscious clenching. I'm keen to hear others with this issue.