Everyone has a dry mouth once a while when ther are upset,, nervos under pressure or scared.But if someone have it all the time or most of the time it is termed a dry mouth.
It is a condition of not having saliva or so called spit which keeps the mouth wet in enough amount.
Saliva is most imp as it helps in digestion,, buffers oral cavity so prevents infections by controlling growth of harmful microorganisms
If not in sufficient amount causes tooth decay &gum diseases &one might not get proper nutrient due to difficulty in chewing & swollowing foods &may lead to bad health
There are diff causes of dry mouth such as parkinsons disease ,,diabetes ..hiv after radio&chemotherapy for cancer or may be due to nerve damage of saliva producing glands or glands itself due to trauma in head &neck region