What is the reason for black patches on the sides of my mouth?

Q: I am having black patches on the sides of my mouth. What should I do?

A:If the black areas are associated with inflammation, then anti allergy/anti fungal/antibiotic medicines may be required. If it is a post-inflammatory pigmentation, then it is likely to fade away on its own; it can be hastened with the use of hydroquinone preparations.