The arch wire of braces fits in the horizontal slots in each bracket. The wire is secured to all of the brackets, and occasionally, simply by the act of biting and chewing, the end of a wire will work itself out and cause irritation.
The best way to alleviate the discomfort is to push the wire back down. Use a Q-tip or pencil eraser to push the wire back so it’s flat against your tooth. If you can’t get the wire back to a comfortable position, cover it with relief wax to have a buffer between your braces and the area of your mouth that’s irritated.
In an extremely bothersome situation, and as a last resort, clip the wire. Reduce the possibility of swallowing the snipped piece by putting a folded tissue or piece of gauze around the area. Use sharp clippers and snip off the wire. Use relief wax if the area is still irritated.
Make a follow-up appointment with your orthodontist to make sure the braces are still secure and to get a different wire if necessary.