I have very dark spots on my forehead. This problem started two years ago. Since then I am unable to get rid of this. I have used various creams, gels but they are of no use. The forehead part is tanned dark and the spots are very dark. My skin is also becoming dull. I used tablets for stopping my periods. Due to this, I am affected with hyperthyroidism. After this, my forehead is affected with pimples and pigmentation. Kindly suggest me how to get rid of this.