Red line in bum crack

I get a red, sore to the touch “line” from my buttcrack into my anus. it doesn’t ever itch but burns only to touch. this past week it happened again, and its been here for some time now… it started out a darker shade of red and now after consistently applying a baby diaper rash cream it has settled into a faded slightly shiny pink? I can’t go see a doctor about this because I’m in quarantine… I even tried a sitz bath with borax to heal the skin… any ideas?