I Have What Seems Like A Cut On My Butt

I have what seems like a cut on my butt crack a little below the tailbone but not near the anus. It doesn't bleed much and doesn't take much to stop the bleeding but if I sit down for any length of time it's like it opens it again. I sit in a chair all day at work. Short of not sitting for a few days how can I get this to heal up?