If it is very painful you need to go back to the doc and see about getting it re-analyzed and removed. It may just be something like a fatty tumor putting pressure on you, but if it is giving you pain, it should be taken out.
I agree with Ayvah completely. If it is hurting I would recommend getting it cut out. If it's small enough they can even do it in their office. My SO had a fatty deposit cut out of his arm. They numbed it and took it out in the doc's office.
