There are several reasons why a mouth is dry. The dentist will check for signs of decay that can result from decreased salivary flow. Without the cleansing effects of saliva, tooth decay and other health problems can occur. There are certain medical conditions or medications that can cause or contribute to a dry mouth. People who use oral inhalers, like for asthma, can develop oral candidiasis, an oral infection. In this case it is important to rinse the mouth after using the inhaler.
Dry mouth may not be serious but it is important to discuss this with your dentist to preserve the teeth and gums. When visiting your dentist, be sure to talk about anything that seems extraordinary and be sure he or she has a current list of medications and medical conditions. This will help the dentist give you the best oral care possible.