Hello, my name is Dr.Dorina Gurabardhi. I understand your concern. I think that something is causing inflammation in the skin, the end result of which is the pigmentation.You need a skin biopsy to determine the exact nature of the problem. Once that is determined, a treatment plan can be made. To do the biopsy you have to see a dermatologist. Some advices that I can give to you are : -Apply aloe vera gel -Apply cucumber juice -Apply lemon juice Hope my answer was helpful, if you have any other questions I ll be glad to help, thanks!