Piece of Thread from Stitches Left After Rhinoplasty

The suture remnant that you describe is most likely a non-absorbable suture. If left alone this suture will probably work its way to the surface and can be easily removed. Unfortunately foreign material does have the potential to become infected. For these reasons, we generally recommend that these suture remnants be removed as soon as possible following surgery. 

Hi,
Thank you for your question.
It is possible that there was a stitch left behind. See your plastic surgeon, and he will be able to tell you if it is a stitch or something else. It will most likely not do any harm, but any time there is a foreign object left in the body, there could be a chance of infection. It is best to check with your surgeon to be safe.
Best regards.

See your surgeon and he can tell you if it is there or just a blood crust. It will do no harm until it is removed.