A common, and often frustration oral condition, xerostomia can be caused by
- numerous drugs , (prescription and over the counter)
- salivary gland disease
- smoking
- cancer radiation therapy (to which saliva glands are very sensitive)
- habitual mouth breathing
- Other diseases
Besides the discomfort, inadequate saliva can cause increased tooth
decay, gum problems, bad breath and digestion problems.
More information on Dry Mouth and coping with it can be found at:
Article
from Dentistry.about.com