Why does my butt hurt?

I just got done with butt masterbation. I used a lot of lube but my sphincter muscles began hurting. I felt around and realized that there are bumps on the muscles around the opening of my butt and they are red and hurt very badly to the touch. it actually hurts to sit down. what are those bumps and where did they come from.
Thanks

Well, you might have hemrrhoids. These are bump-like blisters inside and outside of the @nus. They cause itching and/or pain. @nal m@sturbation might have inflamed (irritated) them, and caused you to have an outbreak. Talk to your doctor, and let him have a look to make completely sure that it is hemrrhoids you're dealing with. If they are, then discuss options on what you can do to prevent outbreaks, and what medicated creams you can use, such as PreperationH.