Botox

Samson Lee, MD answers: Mouth drooping after Botox for Bell's Palsy

I've had Bell's Palsy since childhood. I'm 47 now, and I had Botox injected in my forehead, the sides of my eyes, and in my chin for the dimple caused by Bell's Palsy. I also had it in the line between my cheeks and nose for the slight twitching. Two days later, my mouth drooped, and it looks like I've got Bell's Palsy again, although the plastic surgeon said it will be okay in a month. It's been two weeks now, why hasn't it gotten any better? 


Samson Lee, MD
12 months ago

I'm assuming you had normal function before your injection of Botox. Any injection of Botox in the area of the mouth has the risk of causing temporary facial paralysis. Depending on the amount of Botox used you eventually will completely recover to your baseline however it is unpredictable when that would be. I would assume 1-2 months. It likely will slowly get better with time. Because of your history of Bell's Palsy and I assume mild weakness of that side of your face I would be very careful about how much Botox you had applied to that side. The reassuring thing is that Botox is always temporary.

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A: The key is knowing how much Botox to put in

Philip Young, MD
7 months ago

Botox typically lasts anywhere from 3-6 months. Although certain high movement areas are more likely to get better faster, your current situation could last up to or longer than 3 months.

The key is knowing the particular person's state. People with Bell's palsy are likely to react to Botox more than someone who doesn't have this. The reason for this is that people with Bell's Palsy have lost some functioning nerves from the condition and hence when it comes to a neurotoxin they are going to be more sensitive to Botox's effects.

In this situation, you have to start at a much lower dose and have the patient come back in 2 weeks to see what the effects are. Botox typically starts to work at 4 days and has its maximum effect at 2 weeks.

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