What Can Happen if I Still Have a Stitch on my Abdomen, After a Year?

Most sutures that are placed under the skin are made of absorbable material that is broken down by the body. Occasionally, this process can lead to sutures coming to the surface and cause redness, tenderness, and even look like a "whitehead." Once the suture material is removed, this quickly resolves. Based on your description, the suture knot is probably still under the skin. I suggest that you see your surgeon who can address this for you.

Sutures can be pesky and sometimes they can "spit" or extrude years after a procedure. Depending on the type of stitch you had (most are absorbable, some are not) this is not uncommon. The problem occurs if the stitch becomes irritated or infected.  If you are having redness or pain, you should go see your surgeon again to check it out. You may need to have it removed.  Good luck.

Most dissolving sutures would have dissolved, so this is most likely a permanent suture. Once it presents to the surface, unless it is removed it is likely to be a continuing source of problems. 

Your surgeon should be able to get it out with the help of some local anesthetic.

Best wishes.