What is Botox for Hemifacial Spasm /
Blepharospasm?
A hemifacial spasm is when the muscles on one side of the face twitch or contract without control. Botox is a common treatment for this condition. When injected into the affected facial muscles, Botox relaxes them by blocking the nerve signals that cause the spasms. This helps reduce or stop the twitching and improves comfort and appearance.
How do you prepare for Botox for Hemifacial Spasm?
- Tell your doctor about any medicines you take, especially blood thinners or muscle relaxers.
- Discuss past reactions to Botox or other injections.
- Arrive with a clean face — no makeup or heavy creams.
- You can usually eat and drink normally before the procedure.
- Most people don’t need to arrange special help afterward, though you may want someone with you if you feel nervous.
Why is Botox for Hemifacial Spasm performed?
- To reduce or stop involuntary facial twitching or eyelid twitching.
- To relieve discomfort, eye irritation, or vision problems caused by constant spasms.
- To improve quality of life and confidence, since spasms can be bothersome in social settings.
- It is often used when medicines are not effective or cause side effects.
What can you expect during Botox for Hemifacial Spasm?
- The treatment is usually done in the doctor’s office and takes about 5–10 minutes.
- A very fine needle is used to inject small amounts of Botox into the muscles that spasm, often around the eyelid, cheek, and mouth.
- You may feel a small pinch or mild stinging with each injection.
- You can return to normal activities right after.
What is the follow-up like for Botox for Hemifacial Spasm?
- Relief usually starts within 3 days and peaks around 3 weeks.
- The effects last about 3 months, so repeat treatments are needed.
- Your doctor will adjust which muscles are injected based on your response.
- Many patients need Botox long-term, but regular treatment keeps spasms well controlled.
What are the potential risks for Botox for Hemifacial Spasm?
Most side effects are mild and temporary. These may include:
- Bruising or soreness at the injection site.
- Temporary mild drooping of the eyelid or corner of the mouth or other facial muscles.
Rare but serious risks include:
- Allergic reaction.
- Double vision or difficulty closing the eye if Botox spreads beyond the target muscle.
Are there related tests to Botox for Hemifacial Spasm?
- Usually, a neurological exam is enough to diagnose hemifacial spasm.
- An MRI scan may sometimes be ordered to check if a blood vessel is pressing on the facial nerve (a common cause).
- Botox injections themselves do not require special testing before treatment.

Providing specialized neurological and pain management care with a patient-centered approach. Dr. Sader combines clinical expertise with compassionate care to help patients achieve optimal health outcomes.