I had some nerve damage on my forehead from a head injury, am I safe to get Botox still?

I have some patients that have had previous head injuries that do wonderfully with Botox injections. There can be long term numbness or altered sensations in any area where trauma has occurred in the past. The Botox is working locally at the junction between the nerve and muscle which interferes with the conduction of the nerve impulse that tells the muscle to contract. There are nerve endings in the forehead which can cause bizarre sensations when triggered. I think this is what you are experiencing. Some people will sneeze when the Glabella (area between the brows) is injected. Other areas might feel like the hair is being “pulled” at the top of the head. I would consider seeing if there is an area on your forehead that reproduces the feelings you had after the Botox. You may try a gentle tap on the forehead with your finger to isolate the area. If you find a spot that is sensitive you can avoid injecting in that area.

Hello,
Nerve damage that causes loss of sensation is from damage to a sensory nerve. The kind of nerves that are used to feel things, like touch, heat, cold etc... It sounds like that is the kind of nerve you injured, and why your forehead feels numb. Botox/neurotoxins are used to relax muscles. These muscles are controlled by motor nerves. These are the kind of nerves that we use to activate muscles to do something, like lifting your forehead up to wrinkle it. In theory, botox should not affect sensory nerves and you should be safe to receive additional injections. However, I would discuss your previous experience with your current injector so they can perform a physical exam and evaluate your motor and sensory nerve function. Hope this helps! All the best, Tom