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
cream which is available over the counter. If the symptoms persist then please consult a dermatologist as oral antimicrobials may be needed. Also take some Vitamin B supplements.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. Treatment can be started only when the diagnosis is confirmed. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.