A dentist warns that persistent chapped lips might indicate an underlying infection.

Winter often brings dry lips, but Dr. Joyce Kahng explains that “this could actually be angular cheilitis,” a fungal or bacterial infection. “Bacteria and yeast can infiltrate the cracked corners of the mouth, leading to an infection. This explains why chapstick doesn’t resolve the issue since it doesn’t target the root cause.”

She identifies two main causes: Staph bacteria and Candida yeast. “If yeast is the cause, over-the-counter Clotrimazole can help. For bacterial infections, prescription antibiotic ointment is necessary. Seal everything with Vaseline, not chapstick,” she advises.

Dr. Kahng also warns against licking the lips, saying, “People think saliva re-moisturizes the area, but it actually worsens the dryness.”

Chronic cases might signal iron or B12 deficiencies. While lip balm helps with general dryness, persistent issues may require treating an infection for lasting relief.