okay, avoiding the doctor as long as possible, there are a lot of over the counter skin tag treatments. try what you feel will be the least painful removal method at first. if there is any pain, STOP.
really, the worry is that the tissue of the anus is very absorbent-- if you've heard of the "vodka tampon," its effective because anything absorbed through the anus bypasses the digestive system and goes straight to the bloodstream.
this sucks dude, but you might have to see the doctor, sorry.