What is angular cheilitis?
Angular cheilitis is a common inflammatory condition affecting the corners of the mouth or oral commissures. Depending on underlying causes, it may last a few days or persist indefinitely. It is also called angular stomatitis and cheilosis.
What causes angular cheilitis?
Angular cheilitis is due to one or more of the following factors:
- Dribble of saliva causing eczematous cheiltiis, a form of contact irritant dermatitis (perlèche)
- Overhang of upper lip resulting in deep furrows (marionette lines)
- Dry chapped lips
- Proliferation of bacteria (impetigo), yeasts (thrush) or virus (cold sores)
Who is prone to angular cheilitis?
Angular cheilitis is common and affects children and adults, especially when they are in poor health. Predisposing factors include:
- Oral thrush: infancy, old age, diabetes, systemic corticosteroid or antibiotic use
- Dentures, especially if they are poor fitting, and there is associated gum recession
- Poor nutrition: coeliac disease, iron deficiency, riboflavin deficiency
- Systemic illness, particularly inflammatory bowel disease (ulcerative colitis and Crohn disease)
- Sensitive skin, especially atopic dermatitis
- Genetic predisposition, for example in Down syndrome
- Oral retinoid medication: isotretinoin for acne, acitretin for psoriasis
It is made worse by licking the lips.
Angular cheilitis may result in the following symptoms and signs at the corners of the mouth:
- Painful cracks / fissures
- Blisters / erosions / ooze / crusting
It may progress to more widespread impetigo or candidal skin infection on the adjacent skin and elsewhere.
Culture of swabs taken from the corners of the mouth may reveal:
Skin biopsy is not usually necessary.
In many cases, no treatment is needed and angular cheilitis resolves by itself. Depending on the specific cause, the following treatments may be useful: