The blackening of the skin around the mouth may be caused by many reasons. One possibility is fungal infection, which can lead to inflammation and blackening of the skin. If you started to have this problem around 20 14, 10, then you may be using Jin Fukang to treat skin problems caused by infection. Jinfukang is a commonly used drug to treat skin infections, and its main components are zinc oxide and berberine.
I'm not sure if Jin Fukang is suitable for you until I know more about your specific situation. Therefore, it is recommended that you consult a professional doctor to get accurate diagnosis and treatment advice. Professional doctors can determine the root of the problem by carefully examining the skin around your mouth and understanding your medical history and other related information.
Besides fungal infection, the blackening of skin around the mouth may be related to other factors. For example, long-term exposure to the sun may lead to pigmentation of the skin and produce dark spots. Hormone changes, inflammatory reaction, friction, etc. It may also cause the skin to turn black. So the exact reason needs to be determined by the doctor according to your specific situation.
If you find that the skin around your mouth turns black, it is recommended to find a professional doctor as soon as possible and treat it according to the doctor's advice. Please avoid using drugs or products by yourself to avoid causing more serious problems. Please pay attention to protect your skin, avoid excessive sun exposure and maintain good oral hygiene habits. I hope you can find a suitable treatment as soon as possible to restore healthy skin.