Guillain-Barré (pronounced ghee-yan bar-ray) syndrome is a very rare and serious condition that affects the nerves.
It mainly affects the feet, hands and limbs, causing problems such as numbness, weakness and pain.
It can be treated and most people will eventually make a full recovery, although it can occasionally be life-threatening and some people are left with long-term problems.
Guillain-Barré syndrome affects people of all ages, but your chances of getting it increase as you get older.
Symptoms often start in your feet and hands before spreading to your arms and legs.
At first you may have:
These symptoms may continue to get worse over the next few days or weeks before they start to slowly improve. In severe cases, you may have difficulty moving, walking, breathing and/or swallowing.
Read more about the symptoms of Guillain-Barré syndrome.
See your GP if you notice any of the early symptoms of Guillain-Barré syndrome, such as numbness or weakness.
Call 999 for an ambulance or go to your nearest accident and emergency (A&E) department immediately if someone:
This is a medical emergency and the person needs to be seen in hospital as soon as possible.
Read more about how Guillain-Barré syndrome is diagnosed.
Guillain-Barré syndrome is thought to be caused by a problem with the immune system, the body's natural defence against illness and infection.
Normally the immune system attacks any germs that get into the body. But in people with Guillain-Barré syndrome, something goes wrong and it mistakenly attacks and damages the nerves.
It's not clear exactly why this happens, but it can be triggered by:
Read more about causes of Guillain-Barré syndrome.
Most people with Guillain-Barré syndrome are treated in hospital.
The main treatments are:
Most people need to stay in hospital for a few weeks to a few months.
Read more about how Guillain-Barré syndrome is treated.
Most people with Guillain-Barré syndrome make a full recovery, but this can take months or even years.
Some people won't make a full recovery and are left with long-term problems such as:
Very occasionally, Guillain-Barré syndrome can cause life-threatening problems such as severe breathing difficulties or blood clots. Overall, around 1 in 20 cases is fatal.
Read more about recovering from Guillain-Barré syndrome.