I am having deep pigmentation on my forehead both cheeks and around mouth. My complex in gone. My neck also become dark. I am 57 years old. I had my menopause. Not having blood pressure or sugar or thyroid. These symptoms are showing around 2 years only. Everybody asking me what happened. Mentally I am very upset. I was under treatment of a dermatologist for the past 2 years. But no improvement. Now I am taking ayurvedic medicine. Vid you suggest me solution for this.