Angular Cheilitis: Why the Corners of Your Mouth Keep Cracking

Angular cheilitis is inflammation, cracking, and soreness specifically at the corners of the mouth, often accompanied by redness and sometimes a fungal or bacterial component contributing to the irritation.

The corners of the mouth are prone to accumulating moisture, whether from saliva pooling in this area, and this consistently moist environment creates favorable conditions for fungal or bacterial overgrowth, similar to how other warm, moist areas of the body are prone to related irritation.

Reduced vertical dimension of the bite, sometimes related to missing teeth, worn dentures, or age-related changes, can cause the corners of the mouth to fold inward more than typical, creating deeper creases where saliva collects and doesn't dry out normally.

Yes, this is a frequently discussed connection, particularly with dentures that have lost proper vertical support over time, since this can specifically create the deeper mouth corner folds that predispose to this condition, making it worth mentioning to your dentist if you experience recurring symptoms alongside denture wear.

Nutritional deficiencies, particularly certain B vitamins and iron, dry mouth, habitual lip licking, and a weakened immune system are all recognized contributing factors beyond the mechanical saliva-pooling issue described above.

Treatment often includes an antifungal or antibacterial topical medication, depending on the specific underlying cause identified, and addressing any contributing factor, such as adjusting an ill-fitting denture to restore proper support, or addressing an identified nutritional deficiency.

Mild cases sometimes improve with simple measures like keeping the area dry and applying a protective barrier, but persistent or recurring cases generally benefit from proper diagnosis and targeted treatment rather than continuing to manage it with over-the-counter lip products alone.

Either can be a reasonable starting point, and given the potential connection to denture fit and oral health factors, your dentist is often well positioned to evaluate and address this, sometimes in coordination with your physician if a broader nutritional or medical factor seems relevant.

Yes, in some cases, this condition can be one of the presenting signs of a deficiency in certain B vitamins or iron, making it worth discussing with your doctor, particularly if it's recurring and doesn't have an obvious mechanical cause like denture fit.

With appropriate targeted treatment addressing the specific underlying cause, many cases show improvement within one to two weeks, though addressing any contributing factor like denture fit or an underlying deficiency is important for preventing recurrence.

Yes, if reduced vertical support from a worn or ill-fitting denture is identified as a significant contributing factor, your dentist adjusting or relining the denture to restore proper support can directly address this specific underlying mechanical cause.