You’re right. I wasn’t aware that hypersalivation occurs in several chronic neurological conditions. I was only aware of it in Parkinsons Disease. So many interesting and weird things our bodies do when malfunctions occur. Most nights my mouth is so dry I can hardly swallow because of my CPAP machine. I wonder what makes it change from one extreme to the other. I guess I will start sleeping on a towel for nights saliva is overflowing. Yeesh!