What are the pros and cons to getting Botox in the masseter?

Botox is a very useful and effective neuromodulator that’s helped transform dermatology over the last few decades. Other than some minor trauma at the injection sites that may persist a few days — such as soreness, redness, or swelling — there really are no cons. That’s provided, of course, that you get your Botox done by an expert. Expertise is especially required when treating the masseters. 
The Pros of working with a Pro when treating the masseter is that it will relax your jaw, give you a slimmer look to your face, and stop you from clenching. The Cons of working with someone who isn’t a Pro is that you could have trouble chewing if you are injected improperly. A board-certified dermatologist who is an expert at using Botox to treat the masseters is the only person you should consider to help you relax your jaw.

The advantage of Botox to the masseter is that it can help bruxism (jaw clenching) and prominence of the masseter muscle from an aesthetic standpoint. The physician needs to be careful in the injection pattern and there may be mild bruising and swelling from injection but as long as a judicious amount is used without excess, nice improvement can be seen. Be sure to see a very experienced board certified plastic surgeon, facial plastic ENT surgeon or dermatologist if you are considering this.