Dissolvable Stitch Remained a Month After Rhinoplasty?

Depending on the type of suture material that was used, it is not uncommon for some of them to persist for several weeks or even a month after surgery. Schedule and appointment with your surgeon to make sure that everything is healing as it should. He or she can also remove it if it is bothering you.

Absorbably stitches can take several months to absorb (even up to 6 months). Confirm that it is an absorbably stitch with your physician becasue some use permanent sutures. If it has done its job and is bothering you , the surgeon may remove it as well

Usually, the sutures within the nostrils dissolve at a variable rate after rhinoplasty. Some seem to dissolve very quickly and others will persist for several weeks.  
So, yes, it's pretty normal to still have a dissolvable stitch a month after surgery.

 Dissolvable sutures in the nose will often disappear after a few weeks. If after 4 weeks it is still present, and it bothers you, go back to your surgeon to have it removed. At this point it is likely not doing anything anymore.

Yes! This is very common after Rhinoplasty surgery, and can be easily removed by your surgeon. Don't try taking it out yourself, but have no fears, you'll be fine. Good luck!