Thank you for your question. Botox is temporary, lasting approx. 3 months. Perhaps consider speaking with your family doctor regarding reasons this may be happening.
Botox for synkinesis- hemi-facial spasm
Botox effects last for 3-6 months. After that time you will return to your pre-treatment state. Discuss possible causes with your primary doctor or neurologist as there are many.
The Botox effect will only last approximately three to six months. If your crooked mouth was related to the Botox injection, it should be showing signs of improvement by now. Your diagnosis thought is not from the Botox. Your doctor will want to investigate a number of possibilities for the underlying cause of this issue.
Diagnosed with synkenesis
This diagnosis is unrelated to your botox injections. Im not sure how you got diagnosed but you should have a full evaluation to figure out why your mouth is twitching when you blink. Botox does not cause this and something else is going on. This could get worse so please see a specialist. I would see an oculoplastic surgeon or ENT specialist. good luck..