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Xerostomia, also known as dry mouth, is a subjective complaint of dryness in the mouth, which may be associated with a change in the composition of saliva, or reduced salivary flow, or have no identifiable cause. [1] This symptom is very common and is often seen as a side effect of many types of medication.
Salivary gland dysfunction affects the flow, amount, or quality of saliva produced. A reduced salivation is termed hyposalivation.Hyposalivation often results in a dry mouth condition called xerostomia, and this can cause tooth decay due to the loss of the protective properties of saliva.
It has also been defined as increased amount of saliva in the mouth, which may also be caused by decreased clearance of saliva. [ 4 ] Hypersalivation can contribute to drooling if there is an inability to keep the mouth closed or difficulty in swallowing (dysphagia) the excess saliva, which can lead to excessive spitting.
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What causes angular cheilitis? ... Angular cheilitis typically starts with a red dry patch on the corners of the mouth. It can be on one or both sides, with a dry, scaly appearance, according to ...
Counterintuitively, constant licking of the lips causes drying and irritation, and eventually the mucosa splits or cracks. [2] The lips have a greater tendency to dry out in cold, dry weather. [citation needed] Digestive enzymes present in the saliva may also irritate the lips, and the evaporation of the water in saliva saps moisture from them. [8]
Irritants include poorly fitting dentures, licking the lips or drooling, mouth breathing resulting in a dry mouth, sun exposure, overclosure of the mouth, smoking, and minor trauma. [2] Allergies may include substances like toothpaste, makeup, and food. [2] Often a number of factors are involved. [2]
Examples of local dryness include dry mouth, dry eyes, dry skin , Diabetic foot and vaginal dryness. These often have specific causes and treatments. It is possible to have dry eyes without any other signs or symptoms, but this usually causes a syndrome of eye symptoms called keratoconjunctivitis sicca.