Written and dentally reviewed by Dr. Manish Pandey, BDS, Dental Surgeon
Last reviewed: September 8, 2026
Angular cheilitis treatment depends on why the corners of the mouth are cracked and inflamed. Saliva irritation, dry skin, poorly fitting dentures, Candida yeast or bacteria may contribute. Repeated or persistent symptoms deserve an examination because simply applying an antifungal or steroid without identifying the cause may delay recovery.
What is angular cheilitis?
Angular cheilitis is inflammation affecting one or both corners of the lips. The skin may become red, sore, softened, crusted or split. Opening the mouth can stretch the fissure and make eating, speaking or dental treatment uncomfortable. It is different from a cold sore, although several conditions can resemble it.
What causes cracks at the corners of the mouth?
Moisture collecting in skin folds is a common starting point. Frequent lip licking, drooling or reduced support from worn or poorly fitting dentures may keep the corners wet. As the skin barrier breaks down, Candida or bacteria such as Staphylococcus aureus can sometimes contribute.
Dry or sensitive skin, eczema, smoking, diabetes, reduced immunity and medicines that dry the lips may increase susceptibility. Iron, zinc or B-vitamin deficiency is considered when episodes recur or when other symptoms suggest a nutritional problem, but deficiency should be confirmed rather than assumed.
Symptoms that may occur
- Painful splits at one or both lip corners
- Redness, tenderness, scaling or crusting
- Burning when eating spicy, salty or acidic foods
- Bleeding when the mouth opens widely
- Repeated softening or whitening of persistently wet skin
A blistering cluster that begins with tingling may suggest herpes rather than angular cheilitis. Honey-coloured crusting, spreading redness or marked swelling may indicate another infection.
How is angular cheilitis diagnosed?
A dentist or doctor usually diagnoses it by examining the lips, mouth, teeth and dentures and reviewing symptoms and medicines. A swab may be taken when infection is suspected or treatment has failed. Blood tests may be appropriate for recurrent disease when anaemia, diabetes or nutritional deficiency is clinically suspected.
Angular cheilitis treatment
Protect the skin barrier
A plain, fragrance-free lip balm or thick emollient can reduce saliva contact and dryness. Avoid licking, picking and irritating cosmetic products. Keep the area gently clean and dry without scrubbing.
Treat the identified cause
A clinician may prescribe an antifungal when Candida is likely, or an antibiotic when bacterial infection is confirmed or strongly suspected. Anti-inflammatory medicine may sometimes be used briefly alongside appropriate antimicrobial treatment. Do not apply leftover steroid, antibiotic or antifungal products: the wrong medicine can worsen or mask another condition.
Correct dental contributors
Dentures should be cleaned as directed, removed overnight unless advised otherwise, and checked for fit. Loss of facial support or deep folds at the mouth corners may require dental assessment rather than repeated creams alone. Rinse the mouth after using an inhaled corticosteroid.
Can angular cheilitis be prevented?
- Use a bland lip protectant during dry weather.
- Avoid habitual lip licking.
- Maintain oral and denture hygiene.
- Have loose or worn dentures assessed.
- Manage diabetes with the responsible clinician.
- Do not take iron or vitamins unless deficiency or need is established.
When should you seek care?
Arrange an assessment if the area is not improving within about one to two weeks, keeps returning, affects only one side repeatedly, or is associated with oral thrush, weight loss or other symptoms. Seek prompt care for rapidly spreading redness, fever, significant swelling, pus, difficulty swallowing or breathing.
Common questions
Is angular cheilitis contagious?
The inflammation itself is not usually considered contagious. Microorganisms can contribute, but casual contact does not automatically cause the condition.
Is it always a vitamin deficiency?
No. Saliva irritation and local mechanical factors are common. Testing is guided by the history, examination and recurrence pattern.
Can toothpaste cause it?
Irritating or allergic reactions to oral products can affect the lips in some people. A clinician can help distinguish contact cheilitis from infection and other causes.
References
- DermNet: Angular Cheilitis
- NHS Health Education England: Mouth Care Matters
- DermNet: Iron Deficiency
Dental disclaimer: This article provides general education and is not a diagnosis or a substitute for an examination by a dentist or doctor. Do not start prescription treatment without professional advice.