Age - 28, weight - 73, Height - 5'9 ...... 13 years back I had Ring worm infection on my tighs, near penis,.... without consultation I applied Dettol - gave a high burning sensation, but Issue persisted....Then I used a Cream to treat Ring worm ... and it was gone .... but skin became dark ......and its still dark after 13 years........ how can I get rid of black patches ??????