What are the early symptoms of somebody starting to get guillain-barre syndrome?

Paresthesias/weak: Guillain-barre can progress very fast but usually starts with strange sensations in the extremities and then weakness that also starts from the extremities, gets more severe affecting trunk. It is critical to get medical attention before the weakness progresses to the diaphragm/muscles of breathing. Rarely (about 5-10%) of the time, these muscles are affected first/early - variant gb.