3. Infectious Causes of Angular Cheilitis

Saliva contains microorganisms that are helpful when inside the mouth but can be detrimental elsewhere. Licking the lips moves these microorganisms to the outside of the mouth, and if the skin is cracked, they can collect here and colonize, becoming the bacteria Staphylococcus or the fungus Candida. Both these infections can cause angular cheilitis.

Infectious Angular Cheilitis selvanegra / Getty Images

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