I got Botox on my neck for my wrinkles. It affected my right lower lip and my smile is crooked. Will this go away?

Thank you
very much for your question. From your information, it appears that the Botox
has migrated to your lips, causing drooping and an asymmetrical mouth. This is
not an uncommon side-effect of Botox injections placed in close proximity to
your mouth and depressor (lip) muscles. Luckily, all of the effects from these
Botox injections will wear off in three to four months. At that time, your
mouth will go back to normal. I recommend reaching out to your Botox provider
about your situation. He or she may have additional advice, and can make a note
of this reaction, so it will not happen again during any future Botox
injections.

A touch-up of Botox may improve this. I recommend following up with your injector. Botox results resolve in 3-4 months. Best, Dr. Emer

Weakening of nearby  muscles is temporary after Botox and usually by the 12th week the normal functionality of the musculature has returned. It may take less or more time in different people but I am not aware of this being a permanent situation. This can happen on the neck if the injection is too close to the nerve that allows the lower chin to lower when opening the mouth so the unaffected side still lowers looking unequal. In time this comes back to normal.You should follow up with your doctor who injected the Botox.The information provided in Dr. Shelton's answer is for educational purposes only and is not intended to constitute medical advice.  The information provided should not be relied upon as a substitute for consultations with a qualified health professional who may be familiar with your individual medical needs. If you are experiencing a medical emergency proceed to your nearest emergency room.