Could my crooked smile after Botox be caused by nerve damage? (photo)

I agree with your Doctor, it probably was a migration to the Risorius muscle, it should recover 100% of the movement after the effect goes away with weeks.

Hello and thank you for the question. After Botox injections, it is possible that the neurotoxin can migrate and effect your smile muscles, which sounds like what you are describing. It would be unlikely to effect the facial nerve with an injection. Botox does not effect nerves themselves, rather it causes a paralysis of muscles by affecting the neruomuscular junction. I would recommend speaking with your initial provider to seek answers about what may have cause the asymmetry you have described.

This is a temporary side effect of Botox which will usually dissipate in 3 - 5 months. The muscle will take some time to go back to its normal strength and movement.