The GP will try to identify the problem by asking about your symptoms and ruling out conditions that could be responsible for your pain.
However, diagnosing trigeminal neuralgia can be difficult and it can take a few years for a diagnosis to be confirmed.
Read more about diagnosing trigeminal neuralgia.
Trigeminal neuralgia is usually caused by compression of the trigeminal nerve. This is the nerve inside the skull that transmits sensations of pain and touch from your face, teeth and mouth to your brain.
The compression of the trigeminal nerve is usually caused by a nearby blood vessel pressing on part of the nerve inside the skull.
Trigeminal neuralgia can also happen when the trigeminal nerve is damaged by another medical condition, such as multiple sclerosis (MS) or a tumour.
The attacks of pain are usually brought on by activities that involve lightly touching the face, such as washing, eating and brushing the teeth, but they can also be triggered by wind – even a slight breeze or air conditioning – or movement of the face or head. Sometimes the pain can happen without a trigger.
Read more about the causes of trigeminal neuralgia.
It's not clear how many people are affected by trigeminal neuralgia, but it's thought to be rare, with around 10 people in 100,000 in the UK developing it each year.
Trigeminal neuralgia affects more women than men, and it usually starts between the ages of 50 and 60. It's rare in adults younger than 40.
Trigeminal neuralgia is usually a long-term condition and the periods of remission often get shorter over time. However, the treatments available do help most cases to some degree.
An anticonvulsant medicine called carbamazepine, which is often used to treat epilepsy, is the first treatment usually recommended to treat trigeminal neuralgia. Carbamazepine can relieve nerve pain by slowing down electrical impulses in the nerves and reducing their ability to transmit pain messages.
Carbamazepine needs to be taken several times a day to be effective, with the dose gradually increased over the course of a few days or weeks so high enough levels of the medicine can build up in your bloodstream.
Unless your pain becomes much better, or disappears, the medicine is usually continued for as long as necessary, which could be for many years.
If you're entering a period of remission, where your pain goes away, stopping carbamazepine should always be done slowly, over days or weeks, unless a doctor tells you otherwise.
If this medicine does not help you, causes too many side effects, or you're unable to take it, you may be referred to a specialist to discuss alternative medicines or surgical procedures that may help.
There are a number of minor surgical procedures that can be used to treat trigeminal neuralgia – usually by damaging the nerve to stop it sending pain signals – but these are generally only effective for a few years.
Alternatively, your specialist may recommend having surgery to open your skull and move any blood vessels that are compressing the trigeminal nerve. Research suggests this operation offers the best results for long-term pain relief, but it's a major operation and carries a risk of potentially serious complications, such as hearing loss, facial numbness or, very rarely, a stroke.
Read more about treating trigeminal neuralgia.
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