Cracked lip corners can be caused by a variety of factors, including dryness, cold weather, a vitamin B deficiency, bacterial or yeast infections, or illness. Here are some tips to heal cracked lip corners fast:

1. Apply a balm: Use a balm that doesnt contain menthol, which can dry out your lips. Some recommended balms include Aquaphor, Vaseline, and CeraVe Healing Ointment. Coat your lips, focusing on the corners, and apply an extra coat at bedtime for overnight repair.

2. Hydrate internally: Cracked, peeling lips can be a sign of a vitamin B deficiency. Add a supplement to your routine to treat the situation from the inside out.

3. Use petroleum jelly: Apply petroleum jelly to the corners of your mouth and keep applying it until the corners have healed up. It acts as a barrier against further infection and allows your body to heal.

4. Rub coconut oil: Apply a finger-sized dab of either liquid or solid coconut oil to the cracks on your mouth. Coconut oil is an inexpensive way to help heal the cracks in the corners of your mouth.

5. Get a lip balm containing vitamin E and/or shea butter: Choose a lip balm with vitamin E, shea butter, or both. These are highly moisturizing ingredients that can also act as healing agents when your lips are cracked.

6. See a dermatologist: If your case is severe or your at-home treatments arent working, your doctor can help you treat the underlying cause. They may prescribe a topical steroid or antifungal treatment to pair with an occlusive balm.

Its important to note that if you suspect something else is causing your cracked lip corners, its best to check in with a dermatologist to figure out your best course of action.