Will my jaw return to normal after Botox?

Sorry to hear you’re not happy with your BOTOX® results. The good news is that your jawline should go back to normal once the effects of the BOTOX wear away. This usually takes around 3 to 4 months, but since everyone will react slightly differently to BOTOX injections, this timeframe can vary. If you choose to get BOTOX again or other injectable treatments in the future, make sure you’re working with an experienced cosmetic surgeon to get the best results.

Thank you for your question about the duration of botox in the masseter muscle.  Botox results typically last 3-4 months.  However, every individual is different in the way your body reacts with the product.  As a general rule, you will want to get a touch up of botox every 3-4 months.  
To be sure, see two or more experienced, licensed and board-certified providers in your area for a complete evaluation to make sure you are a good candidate and that it is safe for you to have treatment. I hope this helps.

Botox will last 3 months, so yes your face will return back to baseline.  I would not base your opinion of Botox on this one treatment. Botox treatment is catered patient to patient. Better results maybe achieved with less units or a different placement of the units. Be sure to follow up with your provider to communicate your concerns and goals. I hope this helps you.