Keep the area clean and dry
Apply petroleum jelly or a thick fragrance-free ointment several times a day
Avoid licking, biting, or picking at the corners of the mouth
Use a mild lip balm regularly
Drink enough water
Avoid spicy, salty, acidic, or very hot foods
Switch to a gentle toothpaste without strong flavoring if it irritates the area
Use an antifungal cream if a yeast infection is suspected
Use a mild hydrocortisone cream only if advised by a healthcare professional
Treat dry lips and mouth breathing if present
Check for and correct vitamin or iron deficiency if recommended by a clinician
See a dentist or doctor if it lasts more than 1 to 2 weeks, keeps coming back, or is painful, swollen, or infected