I just had stitches removed from upper eye lid surgery but one stitch was left over. Is it bad?

Yes, it sounds like you have a stitch (suture) left over after your eyelid surgery. This is very common, it won't cause any damage, but you should go back to your surgeon to have it removed (because it will continue to bother you, just like a misplaced eyelash.)Out of all the surgeries I perform, I find that stitches can be a bit bothersome in two cases: behind the ears in a facelift, and around the eyes after a blepharoplasty. These are very fine, small sutures that are meticulously placed into anatomically complex places. Placing these stitches requires skill and technique...removing them sometimes feels harder!Every plastic surgeon uses a different technique to suture the eyelid, and one approach is not necessarily better than the other. Some sutures are absorbable, some are not. Some need to be removed, some dissappear on their own. The eye is a very sensitive spot, so you will definitely notice a retained suture. Best to go to the office and have it removed. If it turns out you need to go back several times...don't worry that your surgeon isn't doing a great job. These particular sutures are a bit nettlesome for all.

Please do not wait for your next visit.  This can occur where a bit of suture is left.  It is generally no intentional.  Don't assume it was intentional.  Sutures are foreign bodies.  They can get infected so contact the office and have this bit of suture removed.

These sutures are usually permanent so they have to be removed.  They do not react with the skin and it should not cause any problems, just purely cosmetic.  You can have it removed at any time, although sooner is better as it may become buried.