I agree with the view expressed by Eva. Please have it checked. It could be an abscess, which has turned into a fistula. I had a peri-anal abscess/pimple in October 2003, which was treated by my surgeon. Unfortunately, the same, later on seems to have resulted into an abscess and then horse shoe fistula. It is now communicating with my J pouch and always abscessing, leaking since last 3 years.
So don't neglect. Don't ignore such goose pimples. They may be scarry.
45 years Male Attorney
Diagnosed UC October 1989
Had two stage J Pouch Surgery Nov 2005; Take Down March 2006
Complications after surgery - Incisional Hernia and Ano Fistulas
"There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle: Albert Einstein
"What you are aware of you are in control of; what you are not aware of is in control of you."