Can fecal soiling/not cleaning well after bm cause irritation around outside/hairline of anus? tiny blood, no fissure, itching. doc said pruritus ani.

Hygiene: Proper hygiene may help. Pruritis ani is an other way of saying itchy ass. You may help your cause by washing your bottom with water after every bowel movement and drying the skin with tissue paper. Use plain tissue paper without color or scent. If that helps you may wish to purchase a contraption like Toto Washlet to facilitate anal hygiene.