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Psychogenic polydipsia caused by psychiatric disorders—oftentimes schizophrenia—is frequently accompanied by the sensation of dry mouth. Some conditions with polydipsia as a symptom are non-psychogenic (e.g., early Type 2 diabetes , primary hyperaldosteronism , and zinc deficiency , and some forms of diabetes insipidus ).
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 the Cleveland Clinic.
Angular cheilitis is thought to be a multifactorial disorder of infectious origin, [10] with many local and systemic predisposing factors. [11] The sores in angular cheilitis are often infected with fungi (yeasts), bacteria, or a combination thereof; [8] this may represent a secondary, opportunistic infection by these pathogens.
Xerostomia is the subjective sensation of dry mouth, which is often (but not always) associated with hypofunction of the salivary glands. [3] The term is derived from the Greek words ξηρός (xeros) meaning "dry" and στόμα (stoma) meaning "mouth". [4] [5] A drug or substance that increases the rate of salivary flow is termed a sialogogue.
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.
Lip licker's dermatitis which is a subtype of irritant contact cheilitis is caused by an exogenous factor rather than an endogenous one. [10] Irritant contact cheilitis can be separated into different reaction types, so it is an umbrella term and further evaluations are usually needed to properly classify the presenting condition.
Iron-deficiency anemia is mainly caused by blood loss, such as may occur during menses or gastrointestinal hemorrhage.This often results in a depapilled, atrophic glossitis, giving the tongue a bald and shiny appearance, along with pallor (paleness) of the lips and other mucous membranes a tendency towards recurrent oral ulceration, [6] and cheilosis (swelling of the lips). [7]
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