lesion at the corner of the mouth and manifests as deep cracks or splits. More commonly it is caused by a fungal infection.
Dry out the lesions completely by patting and air drying after washing with a mild soap and use petroleum jelly to lock out moisture. It is vital that the affected areas be clean and completely dry before application of the jelly. You can also apply small amounts of athlete
If the symptoms persist then please consult a dermatologist as oral antimicrobials may be needed.
I hope it helps. Take care and please do keep me posted on how you are doing or if you have any additional doubts. Kind regards.