Gillian barre syndrome is caused by an unknown virus that affects 1 in 10000 people. Usually people have respiratory or gastrointestinal symptoms, once those symptoms have disappeared for a couple of weaks you usually feel numbness and tingling in your fingers and/or toes. This then leads to paralysis.Some tests can be ordered like a NCV, EMG, CSF, or ECG. Usually treatment consists of IVIg (immunoglobulin G therapy). Recovery takes weeks to years. And weakness can still be felt after 3 years. I hope this helps. The topic of guillian barre syndrome is still relatively new to medical professionals and a lot is still unknown.
