Ok, the other day I had thought I may have cut my anus somehow while shaving because I felt a stinging sensation. Later on that day I found a bump right inside the anus opening. I thought OK, I have an external hemorrhoid. I asked my boyfriend to look at it because it wasn't all the way inside my butt. He looked and said it was black. I figured it was blood. So today I took it upon myself to look and I discovered that there is about a three inch long, tattoo inch wide dark black line leaving to this bump. There is no itching or bleeding, it just hurts. Is it a hemorrhoid or a boil, or something else? Should this sudden black line worry me?
Thank you!