Why is my mouth dry even though I drink a lot of water? A dry mouth can occur when the salivary glands in your mouth don't produce enough saliva. This is often the result of dehydration, which means you don't have enough fluid in your body to produce the saliva you need. It's also common for your mouth to become dry if you're feeling anxious or nervous. Home treatments for dry mouth Drink water. Sipping water and staying hydrated can help relieve dry mouth. ... Avoid certain medications. ... Kick dehydrating habits. ... Suck on sugarless candies. ... Chew sugarless gum. ... Improve overall oral care. ... Use alcohol-free mouthwash. ... Avoid breathing through your mouth.