Because any illness can decrease production of saliva
Dry mouth can be a symptom of many diseases, such as diabetes, rheumatoid arthritis, anemia, a number of pathologies of the nervous system, hypertension, swelling of the salivary glands, HIV, etc. the correct diagnosis can only specialist, so you need to seek medical advice.
Dry mouth is also caused by certain treatments, such as radiation therapy or chemotherapy.
The cause of dry mouth can be damage to the neck (or head) of the nerves as a result of injury or surgery. Also the mouth is often dry when infectious disease occurs in severe form, causing a General intoxication and dehydration, for example, in influenza, pneumonia.
The reasons, which can dry out the mouth
Dry mouth can be caused by Smoking or chewing tobacco, because nicotine is a depressing effect on the work of the salivary glands. Production of saliva can also decrease due to nervous tension and stress.
Dry mouth can also lead to the violation of nasal breathing. As a result the person is forced to breathe through the mouth, which accelerates the evaporation of the saliva.
Dryness of the mouth may be the result of consuming excessive amounts of salty or pickled foods. Finally, the mouth may be dry due to intake of certain medications.
Sensation of dryness in the mouth – a characteristic side effect of antihistamines (Suprastin", "Tavegil", "Catrina", "Girteka"), as well as medicines relaxing smooth muscles. It should be noted that with age the amount of produced saliva is reduced. Therefore, older people often complain of dry mouth.
Low production of saliva not only causes discomfort, but also increases the risk of caries development and various inflammatory processes in the oral cavity. In addition, at the increased dryness of the mouth uncomfortable to wear dentures (those people who are in need). So in any case you must consult a doctor. He will recommend solutions for rinsing the mouth, which can restore a natural moisture. In some cases drugs that stimulate salivation. To activate the production of saliva, suck candy, or chew sugar-free chewing gum.