I have lot of dot sized flat moles on my face. But these moles changes their shed with time. Now a days suddenly all my moles are getting darker and darker. Earlier they were quite light in shade. I have noticed such change earlier also, when they get darker at times and lighter at other times. So any treatment to reduce over pigmentation of my moles except wearing sunscreen as I do not go in sun ever. please suggest me some medicine or ointment for reducing over pigmentation of my moles?