Does anyone know if there is a cure to Angular Cheilitis, or how to remove dark circles on the sides of the mouth completely?

I would have splits on the sides of my mouth due to yawning (etc).When I'd have these wounds I'd lick both sides of my mouth to stop the pain, but licking the wounds would just make it worse due to the bacteria we have in our saliva.I've done research and come upon something called Angular Cheilitis.I rarely have the splits anymore,you can see dark circles on both sides of my mouth.Can someone tell me how to get rid of these dark circles completely it would be greatly appreciated.