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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.
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]
In the unusual cases reported where it affects the upper lip, this may be due to upper lip prominence. [7] The commissures (corners of the mouth) are not usually involved. [2] [6] Affected individuals may experience symptoms such as a dry sensation and cracking of the lips. [7] It is usually painless and persistent. The appearance is variable.
Cases have risen dramatically over last decade, according to recent research
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.
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Dry mouth, [1] dry mouth syndrome [2] 3D medical illustration still showing decreased or insufficient functioning of salivary glands. 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 ...