Can septoplasty splints move?

It is best to ask your surgeon about any splint related question as they know exactly what type has been used and how secured. In general, if plastic splints are used they get sutured to your septum and as such very difficult (and painful) to move or remove them without cutting the suture. 

Hi. If your doctor advised that he stitched the internal nasal splints in place, it is highly unlikely that you have dislodged or moved them.