You have been diagnosed with Guillain-Barré syndrome (GBS), a condition that affects the nervous system. In people with GBS, the immune system attacks the nerves, often following an infection. However, it can also arise out of the blue. This attack can cause weakness or even paralysis. GBS is a temporary illness. Most people return to normal and have no further problems. Others may have some permanent nerve damage. Here's what you can do to help yourself recover.