"Freezing" feeling after Botox injections for headaches

Your injector might have injected Botox close to a sensory nerve, and you may be noticing a different sensation. This should subside over the next few hours. If it does not, call your physician who did the Botox.

Possible. It is the reaction of the nerve being affected by the neurotoxin, although is it possible that the neurotoxin was injected into a small artery. It will pass. Temporary effect only.