Angular Cheilitis/ Cheilosis. No cure?

Suffering from Cheilitis since 10 years, having consulted almost all good doctors there isn't an inch improvement in my condition. Everytime I consult a doctor, they prescribe a TCS, multivitamins, iron, some lipbalm, some sunscreen, some facewash, some moisturizer bla bla bla. And I don't even have count of how many times I have purchased these costly medicines which hardly work. No doctor listen to my previous experience, and just prescribe all this year, inspite of telling severity and chronic nature of this indication. I don't feel good at all writing this up, it has made me cry n number of times. I just want to know is there even a cure for this Cheilitis, can hyperpigmentation developed after it ever be treated? Or is this a rare condition with no cure?