Botox to Fix Pouty Mouth?

Botox works well for helping to improve pouty lips especially if the mentalis muscle is very active and the corners of the mouth are sagging downward. However, you need to be careful to not to overdo it and inject the botox in the correct place. This is critical for this area. The key is to inject a small amount in the mentalis and depressor muscles of corner of the mouth. Use only about 3-4 unites of Botox only.

There are other risks to significantly weakening the mentalis which include the loss of the abiltiy to maintain the fluid retaining functions of the lower lip with resulting drooling. You may want to consider temporarily blocking the function of the muscle with a local anesthetic to asses the appearance prior to seeking longer term correction with botulinum toxin

The mentalis or the orbicularis oris muscles might be involved in creating the rolling forward of the lower lip. It could be an inherited normal anatomic variant and the muscle treatment with Botox might not effect the change that you desire. The use of Botox here is an off-label use and you could have an undesired result such as dribbling or drooling, difficulty in pronouncing some letters, singing or playing a wind instrument. If Botox were to be tried, a very low number of units should be injected. You can always add more, but if it is too much for you, it will last for quite some time.