There are several reasons for dry mouth but they all basically come down to a deficiency in saliva production. Saliva is vital in protecting teeth and gums from harmful bacteria. Dry mouth is a strong indication that not enough is being produced.
The most common reasons for dry mouth include:
– Dehydration from a lack of water
– Medications, both prescription and over-the-counter
– Tobacco and tobacco products
Usually “drinking plain water is always your best bet” in curing dry mouth but you should consult your dentist if it is a persistent problem.
A full article on dry mouth can be read at http://yourdentalhealthresource.com/what-are-the-causes-of-dry-mouth/.