I have white cracks on the corners of my mouth?

Angular Cheilitis: Or cracks at the corners of the mouth. The most common cause of the cracks is a fungal infection. Home remedies for cracked corners of the mouth include drinking plenty of water and using a lip balm that contains beeswax or petroleum jelly. Stay away from treatments or creams containing alcohol or menthol. Rec.: if concerned see your dentist for evaluation and treatment.