Angular cheilitis is a common inflammatory condition affecting the corners of the mouth. Apply Lip balm or coconut oil ointment  frequently. If you have deficiency then you may require Nutritional supplements.

Greetings. Plz note the following 1. see a qualified dermatologist near you- for examination and evaluation of cause of angular chelitis. 2. could be related to any irritant allergy / vitamin deficiency/ candidal infection - thus may need treatment according to the cause 3. use bioline jelly regularly / do not keep licking your lips with your tongue. Hope this helps.