Almost a month ago, I experienced numbness starting in my right thumb and index finger, and it spread up my forearm, upper arm, around the back of my neck, into my left
jaw, left chin, left ear, left cheek,
and into my
tongue. I also felt
numbness in my left mid-back, left shoulder blade, left breast, and the back of my left upper arm. This all happened after I had been seated for more than 5 hours.