Angular cheilitis, those painful cracks at the corners of your mouth, typically clears up within two weeks with the right treatment. The key is addressing what’s actually causing it: usually a fungal or bacterial infection thriving in moisture that collects where your lips meet. Here’s how to treat it effectively and keep it from coming back.
Why It’s Happening
Angular cheilitis starts when saliva pools in the creases at the corners of your mouth. That constant moisture softens and breaks down the skin, creating an opening for infection. The culprits are almost always yeast (the same type that causes thrush) or bacteria, and often both at once. Anything that increases moisture buildup in those creases raises your risk: licking your lips, drooling during sleep, or wearing a mask for long periods.
Certain structural factors make it worse. If you wear dentures that don’t fit well or have lost teeth that reduce the vertical height of your bite, the skin at the corners of your mouth folds inward more deeply, trapping even more saliva. Nutritional deficiencies account for about 25% of all cases, particularly low iron and deficiencies in B vitamins (B2, B3, B6, and B12). If your angular cheilitis keeps returning despite treatment, one of these underlying causes is likely at play.
Start With a Barrier Ointment
The simplest first step is cutting off the moisture cycle. Apply an unflavored petroleum-based ointment (like plain Vaseline) or zinc oxide cream to the corners of your mouth several times a day, especially before bed. This creates a physical barrier between your skin and saliva, which does two things: it protects the raw skin from further irritation and helps it heal faster by preventing the waterlogging that keeps the infection going.
Avoid licking your lips, even though the dryness and cracking make it tempting. Saliva evaporates quickly, leaving the skin even drier and more damaged than before. If you catch yourself doing it, reapply your barrier ointment instead.
Treating the Infection
A barrier ointment alone often isn’t enough because there’s usually an active infection underneath. Since yeast is the most common cause, an over-the-counter antifungal cream containing miconazole or clotrimazole is a reasonable starting point. Apply it to the affected corners twice a day, then layer your barrier ointment on top between applications to keep the area dry.
If there’s no improvement after a few days of OTC treatment, you’ll likely need a prescription. The standard approach combines an antifungal cream applied twice daily for about two weeks with a mild steroid ointment to reduce inflammation and speed healing. The steroid addresses the redness, swelling, and cracking while the antifungal clears the underlying infection. Most people notice improvement within the first few days, and the condition typically resolves completely by two weeks.
Don’t use a steroid cream on its own. Steroids suppress the immune response in the skin, which can actually make a fungal or bacterial infection worse if it’s not being treated at the same time.
When It Keeps Coming Back
Recurring angular cheilitis usually points to something your body needs that it isn’t getting, or a structural issue that keeps recreating the conditions for infection.
If you wear dentures, poor fit is one of the most common drivers of recurrence. Dentures that have worn down or don’t maintain enough height between your upper and lower jaw create deeper skin folds at the mouth corners. Getting your dentures adjusted or replaced to restore proper bite height can make a significant difference. Good denture hygiene also matters: cleaning them thoroughly every day reduces the yeast population in your mouth.
For people without dentures who keep getting flare-ups, it’s worth asking your doctor to check your iron levels and B vitamins. Iron deficiency anemia in particular is a well-documented trigger. Correcting the deficiency often stops the cycle. Foods rich in iron (red meat, lentils, spinach), riboflavin (eggs, dairy, almonds), and B12 (fish, meat, fortified cereals) support the skin’s ability to heal and resist infection at the corners of the mouth.
Angular Cheilitis vs. Cold Sores
People often confuse angular cheilitis with cold sores, but they’re different conditions requiring different treatments. Cold sores are caused by the herpes simplex virus and can appear anywhere on or around the lips, typically starting as a cluster of small blisters that eventually crust over. Angular cheilitis occurs strictly at the corners of the mouth, produces cracks and redness rather than blisters, and is driven by fungal or bacterial infection rather than a virus. Antiviral cold sore treatments won’t help angular cheilitis, and antifungal creams won’t help cold sores.
Speeding Up Recovery
Beyond treating the infection and protecting the skin, a few habits make a noticeable difference in how fast you heal. Keep the corners of your mouth dry by gently patting them after eating or drinking. Sleep on your back if possible to reduce saliva pooling. Avoid opening your mouth excessively wide when eating, as this stretches and re-cracks healing skin.
Acidic and salty foods can sting the open cracks and slow healing, so you may want to avoid citrus, tomatoes, and heavily seasoned dishes until the skin has closed. Once treatment is working, the raw feeling typically fades within a few days, well before the skin fully heals.