Suggest Treatment For Skin Darkening Around Neck

gud aftrnun doctor,am sufferng from so called pcod because of which my skin is darkenning around my neck region and also getting hair on my chin region please help me out in treating this.my age is20,height is 5.54 and my weight is 63.my insulin level is high 24.03 am suggested wid diane-35 in the beginning later i was given metformin,but this drug din't suit me later was suggested withchrominac-A