I'd like a second opinion: Did my dentist mess up my masseter Botox by injecting too high? (Photos)

Thank you for sharing your question and photographs. Unfortunately the pictures being of different angles it is difficult to know what may be taking place. I would allow a full two weeks to pass for the final results to be known, where a more definite opinion can be made. Hope this helps.

Unfortunately, the photos are not helpful. What I can say is that I have been injecting masseter muscles for quite a few years for muscle hypertrophy and TMJ and bruxism problems and for Asian women desiring a more tapered lower face, and the typical three locations for the injections are within the body of the masseter muscle, usually two injections below a line drawn from the angle of the mouth to the tragus of the ear and equally spaced from each other and a third--a single injection--along the jawline. The three injections essentially form a triangle with the apex at or near the jawline. Depending upon the strength of the masseters, the total number of units may vary from 20 to t30 up to 40 units per side. An additional temple injection is not typically done in most cases. You would be wise to contact your injector. Best of luck.

I will start with a short answer. Looking at your pictures and assuming you were trying to smile the same, it is most likely that your risorius muscles were injected. Maybe part of the zygomaticus major muscle was affected as well.
Typically to achieve a full effect of face slimming (muscle atrophy), 10-12 weeks is required.
Unfortunately, your side effects will also taper over 2-3 months.
It is true that there are various bellies of the masseter muscles, such as deep vs superficial. An injector should be assessing the optimal location injection to achieve the result that you desire. Unfortunately, many injectors are simply taught the "paint by number" method over a short seminar.
The hairline injection sounds like your injector is also trying to treat the temporalis muscle. Again, a single point is not very ideal since the muscle is a wide and strong muscle.
I would highly recommend you receive future treatments from someone that is actually knowledgeable on this topic.

You will want to wait two weeks after your treatment to assess your final results. If you have concerns or questions I encourage you to return to your injector for an evaluation. There is no reversal agent for Botox but the effects of the product wear off gradually over 3 to 4 months.

Botox is a muscle relaxer, and in the masseter muscles is often used to create a jaw slimming appearance, so that is most likely the effect you are seeing. Botox is temporary and only lasts 3-4 months, so it is not permanent. However, I highly recommend getting Botox injection treatments from a provider that is specifically experienced/specializes in cosmetic injections.

Your photos do not help especially so soon after your Botox You must wait at least two weeks to assess it. With the masseter muscle, it takes a long time to properly atrophy such a large and strong muscle.
Dr. T

The photos are of limited use . It takes a longer time than one week for neurotoxins to atrophy masseter muscles because it is a larger muscle . Also it is best to have the muscle examined while it is in motion as opposed to a still photograph. The fact you are feeling “ tight” means it is causing some paralysis . In addition you could have a small amount of blood in the muscles from the injections themselves which your body needs time to reabsorb... this will give you a “ tight” sensation . If your smile is limited and some of the toxin paralyzes the risorius muscle ( which is next to the masseter) this can limit your ability to fully smile, but one week post treatment it too early to tell , plus the photo angle and still photograph are limited usefulness

Hello and thank you for your question- we would always recommend a face to face consult for accurate treatment advice as it's hard to say without an examination. It is important to treat the superficial and deep fibres when injecting the masseter to get a result that looks and works effectively.
I hope that helps with your query, best wishes