I am wondering if I am a suitable candidate for Botox to reduce square jaw muscles.

I have developed a bad habit of clenching my teeth tightly while sleeping, so I often wake up in the morning with a dull ache around my jawbone.
Because I kept overusing my jaw muscles, my lower face line, which used to be quite slender, has now turned into a completely angular square.
I tried to loosen my tightly knotted muscles with massage, but it is impossible to reduce the size that has already increased, so I am considering a dermatological procedure.
I am planning to go get a square jaw Botox treatment this weekend, which is said to completely reduce jaw muscles with a simple injection that takes less than five minutes.
However, since I am not exactly sure if my jaw bone itself is wide or if my muscles are developed, I have some doubts about whether I will actually see results from Botox treatment.
I am curious to know what kind of jaw condition dermatologists usually definitively diagnose as a candidate for square jaw Botox and recommend the procedure.
If I feel a lot of hard, protruding bumps when I touch my jaw muscles, can I definitely achieve a dramatically slimmer face after getting Botox injections?
I would like to hear the know-how of our members at Maypure who consistently maintain a sharp and beautiful V-line by getting regular Botox injections in their jaws.
I would like to know in advance if the dull, throbbing pain during the procedure is bearable, and if chewing food will be very uncomfortable for a few days as the medication spreads.
I earnestly hope for warm comments from seniors with extensive experience in dermatological procedures so that I can beautifully regain my lost slender jawline.