After 4 units of Botox in my chin I cannot speak and smile is dragging down, what can help? (Photos)

Thank you for your question. You submitted several photos and you state you underwent Botox® for the chin,specifically 4 units used, which resulted in challenges in your ability to speak, the way you smile, and the position of your lower lips relative to your teeth. You are looking for guidance on what to do moving forward.
I can certainly give you an opinion on what I believe is the situation. A little background: I’m a Board-certified cosmetic surgeon and Fellowship-trained oculofacial plastic and reconstructive surgeon. I’ve been in practice in Manhattan and Long Island for over 20 years and our specialty was one of the first to use Botox® so I’ve been administering Botox® for facial rejuvenation since 1993.  
I suspect you had Botox® in the chin to get improvement of chin dimpling. There is a muscle called the mentalis muscle that is associated with peau d'orange or dimpling of the chin, with 4 units a very small amount to limit the effect of this muscle. A little Botox® in that same area, but placed a bit deeper, can affect the muscles that depress the lip or bring the lip downward, which is why you can see in one of your photos one side of the lip coming down further than the other. It appears the Botox® is affecting more than the intended target muscle, so you are getting this effect.
The question that comes to mind is the number of units, which is relatively small. It’s a bit unusual from my experience to see that amount of effect. If it turns out this is the number of units, then it means that this material diffuses very easily into the adjacent muscle. Since Botox® effects are usually limited to 3-4 months given the number of units used, there is a good chance this effect will wear off in about a month to 6 weeks, so at least you will have a better appearance at that time. Unfortunately, there is no way to reverse Botox®. Sometimes, if someone has an undesirable result that causes an imbalance, you apply Botox® to affect other muscles to balance it out and create symmetry. I’ve done that for patients with issues with asymmetric upper or lower lips after either injectable treatment, or the use of neuromodulator like Botox® done elsewhere. We try to balance them out to allow patients to coast through the next few months while the Botox® wears off.
For now, I think it is probably better to just wait. Given the number of units, even if it’s slightly more, it should wear off fast enough. There is not much else we can do in the meantime. I understand you speak for a living and some adaptation will be necessary to get past this, but I think it’s just a matter of time before you’re back to your normal self. You may want to reconsider Botox® in the future given this outcome. I hope that was helpful, I wish you the best of luck, and thank you for your question.This personalized video answer to your question is posted on RealSelf and on YouTube. To provide you with a personal and expert response, we use the image(s) you submitted on RealSelf in the video, but with respect to your privacy, we only show the body feature in question so you are not personally identifiable. If you prefer not to have your video question visible on YouTube, please contact us.

Unfortunately Botox lasts about 3-4 months and there is no reversal like there is for dermal fillers. It appears that some of the botox has migrated and diminshed the contracture of the depresor Labii Inferioris muscle  and the opposite side is unopposed, giving you this problem. If it is truly a problem of migration, the effects of the botox may not last the full 3-4 months. I think that it is likely that you will see a return to normal in a shorter period of time.

It seems that your botox may have migrated and affected a different muscle.  Unfortunately this will have to wear off and may take 3-4 months.