Muscles pop out of place?
 

Any one ever have this happen to them? I'll sit around for a while then get up and yawn or stretch, and my muscle will pop out of place. This primarily happens when I yawn... the muscle right under my chin sticks out and hurts horribly... itll go back to normal after a few seconds or if I push against it, but it's extremely annoying... any advice?

see a doctor, cuz thats really really not normal, i think my teacher in like 7th grade ahd to have surgery for sumthing like that