The first thing to do, is to know what causes dry mouth. Dry mouth treatment begins with identifying its cause. When dry mouth cannot be avoided as a side effect of illness or medical treatment, it's important to know how to manage it and how to prevent dry mouth while sleeping.
There are foods that help dry mouth. Some spices can trigger salivation such as cayenne pepper, fennel seeds or cardamom seeds.[3] Ginger or ginseng sprays also help to soothe dry mouth; so you can use a ginger/ginseng-based products for maximum effectiveness and as home remedies for dry mouth at night.