I have a raised line on my butt cheek close to my crack that itches and won't go away. what could it be?

Anorectal disorders: A painful, itchy lesion near the anus could be an anal fissure with scarring, a skin fungal infection, or the beginning of a perirectal/perianal abscess, among other problems. A persistent lesion should be evaluated by a careful physical examination by a physician, including a rectal exam, along with a detailed history of the symptoms.