Suggest Remedy For Protruding And Inflamed Scar In Anus

I'm 16 years old, and sexually active. I have no std's and niether does my partner. We tried anal sex one a year ago, and I tore a little. I took care of it and it healed. I've had a tiny little scar on the bottom of my anus. Now the scar is inflamed and red. Its protruding a little and really uncomfortable. Like itching. help!