I had dry mouth few days after injections and two weeks after injections, I noticed there was no salvia from both sides and bottom of my mouth. My throat is so dry and I have swallowing problem. I suspect Botox was injected into my parotid glands and submandibular glands which suppress the saliva. Did Botox damage my glands permanently? Botox wears off in 3-4 months, what about Botox injected into glands, will it wear off? Anything can be done to have my saliva back?