“Hi I am 20 years old, when I smile or laugh my mouth opens very wide so it seems that my smiel goes from ear to ear! is there anyway to fix it so when I’m laughing, my mouth won’t open as much?”
This is a significantly delicate and tricky proposed concern. Overall there is not a recommended surgical procedure. However, based on your anatomy there is a possibility that some expertly placed small degree of Botox can diminish some of the widening of the smile. However, nonetheless this has to be done, performed and assessed by a physician who does a significant amount of Botox treatments. Overall, I think that it is important to get a good opinion from a physician as to whether anything, if at all, should be done. Try to trust the opinion of the physician that you consult with and if you have a trustworthy physician and a physician who is well recommended and if this physician says don’t have any procedures done then importantly you should listen to this recommendation.