Don't delete your thread faggot.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5784581/>The exercise schedule consisted of 3 sets of 20 repetitions each of rapid and maximum jaw-opening movement with a 10-second interval between sets. The exercise was performed twice daily for 4 weeks.>Following the intervention, there was a significant increase in the vertical position of the hyoid bone at rest. It seems to be a problem with the muscles that open the mouth. I can't do the exercise because I got TMJ from getting my jaw dislocated.
For me this problem formed around my late 20s. I had a normal chin before. If it can form, it can also be reformed.
