Worried about a square jaw that looks angular..

Hello. I am inquiring about a procedure because I have recently become concerned about my angular jawline and developed jaw muscles.

My masseter muscles tend to protrude when I chew food or clench my molars, so I am wondering how effective Botox treatment would be. Also, if I am concerned about a double chin or excess fat along the jawline in addition to the jaw muscles, I would like to know if it would be beneficial to combine it with contouring injections or lifting procedures such as Ulthera or InMode.

I would like to know when the effects of square jaw Botox usually appear and the approximate duration of the results, as well as if there are any side effects or precautions, such as weakened chewing ability.

Please let me know if it is possible to proceed with the procedure on the same day following a detailed consultation after visiting the clinic.