Pressure on a nerve can disrupt its function, and it can be in just about any sensory nerve and does not take that much pressure. Sitting on the throne can yield a numb leg, or sleeping in the wrong position may result in your thinking that a stranger's hand is hitting you, when it's your own. The problem comes when your mind starts to run away, and you turn to Dr. Google only to come away fearing for your life. But, to recycle a famous saying, the only thing you have to fear is fear itself. So take a step back, and read this little article.