Also called angular stomatitis, angular cheilitis is the inflammation of the corners of the mouth, usually due to a bacterial or fungal infection. It typically causes redness, soreness, cracking, crusting, and sometimes bleeding at the corners of the mouth.
The condition is most likely to develop in those with poorly fitting dentures; people whose diet is low in vitamin B12, folic acid, or iron; those with certain long-term bowel problems; and people who salivate excessively.
Angular cheilitis is treated with antifungal or antibiotic medication and, if necessary, the treatment of any associated condition, such as a dietary deficiency. Good oral hygiene can help to prevent a recurrence.

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