I've been doing the Botox injections for almost 2 years now and did not have any of the side effects with any muscles at all. It's been great for me.

It does effect any muscles in my face.

My neurologist injects forehead, temples, top of head and behind left ear in the muscle area

They ate mostly the forehead and back of neck and shoulders . Mine don’t effect mouth.

I have been receiving Botox treatment for 2 1/2 years and my migraines are much better. They are no side effects; however, when the Dr. increased the amount of botox, my head was very sore in the areas of the injections. I have daily headaches, but they go away. Am not missing work and can function most of the time.