<s>[INST] Hello doctor, I have a horizontal black line on my nose from the past seven years. During the time of menses, it looks lighter, but on the other days, it looks darker. I applied everything from lemon juice, potato juice, cucumber, kojic cream, etc. But nothing works. What should I do? [/INST] Hello. This will help you hopefully. for more information consult a dermatologist online --> </s>