People get dry mouth when the glands in the mouth that make saliva are not working properly. Because of this, there might not be enough saliva to keep your mouth wet. Side effects of some medicines. More than 400 medicines can cause the salivary glands to make less saliva. Medicines for high blood pressure and depression often cause dry mouth.
Some diseases affect the salivary glands.
The salivary glands can be damaged if they are exposed to radiation during cancer treatment. Drugs used to treat cancer can make saliva thicker, causing the mouth to feel dry. Injury to the head or neck can damage the nerves that tell salivary glands to make saliva. Dry mouth treatment will depend on what is causing the problem. If you think you have dry mouth, see your dentist or physician.