What are the signs of a dry mouth and the best remedies to treat a dry mouth?

There are many reasons why a person has a dry mouth. Thirst from insufficient daily fluid intake will be felt as a dry mouth. Mouth breathing because of nasal congestion will dry out the usually moist membranes in the mouth, especially if humidity is low. Anxiety often makes your mouth dry – think about how your mouth feels when speaking in front of a large audience. 
Diabetes with high blood sugars results in dry mouth and frequent urination. Many medications cause dry mouth, including antihistamines, some antidepressants, and drugs for bladder control. Any condition that interferes with the normal production of saliva will cause a dry mouth, such as diseases of the salivary glands or blockage of the salivary ducts. Addressing the underlying cause is the key to improving the symptoms.