A dry or sticky mouth can be easy to dismiss, especially after a busy day or a long night’s sleep. But when the feeling keeps coming back, it may mean your mouth is not making enough saliva. Dentists call this xerostomia , or dry mouth. Dry mouth is more than an inconvenience. Saliva plays an important role in protecting your teeth, gums, and oral tissues. Understanding the signs—and knowing when to ask for help—can lower the risk of cavities and other problems. Why saliva matters Saliva helps your mouth in several ways. It: Moistens food and makes chewing and swallowing easier Washes away food particles from teeth and gums Helps neutralize acids produced by oral bacteria Provides minerals, including calcium and phosphate, that help keep teeth strong Helps control bacteria and fungi in the mouth When saliva flow is too low, the risk of tooth decay, mouth infections, bad breath, and difficulty eating or speaking can increase. What can cause dry mouth? Dry m...