What is the cause of having a continously dry mouth and pallet?

Many causes: A condition called sjögren’s syndrome is a common autoimmune disorder affecting nearly four million people in the U.S. If you have sjögren’s syndrome, you may have dry-mouth symptoms. The reason is that your immune system is attacking the cells within your glands that make moisture. Aging, depression, inability to chew well, some medications can cause drymouth.

Xerostomia: Usually medications cause dry mouth, or xerostomia. Radiation therapy can also damage the salivary glands and cause dry mouth.

2 possibilities: Generally dry mouth results from aging, medications and or auto immune disease, such a sojgrens syndrome.