Advice after your nerve block for surgery
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Introduction
Some people have problems with the muscles and nerves that control their eyelids and face. If your eyelids are affected, a condition known as blepharospasm, you may be unable to stop blinking, or may even find that your eyes clamp shut. A similar problem, called hemi facial spasm, can cause spasms in your face. You may find that one side of your face starts twitching and your mouth pulls to one side. In severe cases, it may become difficult to talk, eat and swallow.
What is botulinum toxin?
Botulinum toxin (BT) or Botox is a drug that works by blocking nerve signals to muscles. It can be used in small amounts to weaken overacting muscles.
How does it work?
Our muscles move in response to signals received from the brain. In some conditions, the brain sends too many of these signals, which make the muscles, work too hard. They may tighten too much or twitch without warning. Botox blocks these signals from affecting the muscles and allow them to remain relaxed.
How long does BT last for?
The injection takes a few days to start working and usually lasts up to three months. After this, the effects will begin to wear off gradually.
What can I expect from the treatment with Botox?
Treatment involves small injections at specific points in the skin which is decided based on the location of the spasms. The dose and site may sometimes have to be adjusted at future visits. It usually takes a week, or sometimes two, to get the full effect and lasts around three months.
If the effect is too strong then you may develop adverse effects and this can include drooping of the face, mouth, eyelid, brow it can also cause double vision and watering of the eyes. All adverse effects are temporary and will wear off by approximately 3 months.
If you have any concerns after your injection, please contact the staff in the Eye Treatment Centre on the following telephone numbers:
| From 9am to 5pm Monday to Friday: | 0300 373 5884 |
| From 5pm to 9am and at weekends: | 0300 614 5000 and ask for the Eye Doctor on call |
Contact us
If you have any queries relating to this information, please contact the Ophthalmology service.
About this information
Service:
Ophthalmology
Reference:
QQ/023
Approval date:
5 August 2024
Review date:
1 July 2027
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Important note
This page provides general information only. It is developed by clinical staff and is reviewed regularly every 3 years for accuracy. For personal advice about your health, or if you have any concerns, please speak to your doctor.