Stitches Did Not Dissolve After Breast Reduction?

I had a Breast reduction May 19, 2009 and my doctor told me that he used dissolvable stitches. I assumed that by now being almost 8 weeks out that the clear stitches he used would have already dissolved. I have several that are visible outside of the skin and one spot that is really red. It almost looks like how a pimple looks but it’s irritated and hurts because its embedded weirdly in my skin.Today, I went to see my doctor and he removed the painful stitch and it felt much better. Now I noticed the pain is back again and I can feel another stitch in the same spot he removed it from earlier. It is kind of buried in the skin and in order to remove it you have to stick tweezers into the pimple looking wound. What do I do to make them dissolve?