Legal Question in Personal Injury in Pennsylvania

How do you know that you got it from the bed?

You didn't get Bell's Palsy from the bed. From Wikipedia: "Some viruses are thought to establish a persistent (or latent) infection without symptoms, e.g., the varicella-zoster virus[6] and Epstein-Barr viruses, both of the herpes family. Reactivation of an existing (dormant) viral infection has been suggested[7] as a cause behind the acute Bell's palsy. Studies[8] suggest that this new activation could be preceded by trauma, environmental factors, and metabolic or emotional disorders, thus suggesting that stress�emotional stress, environmental stress (e.g., cold), physical stress (e.g., trauma)�in short, a host of different conditions, may trigger reactivation."