Why do i have dark underarms and how can i get rid of them? they are a huge problem. i never want to wear sleeveless tops or dresses because of this. i scrub and they are still dark. is it an insulin thing? i'm 5'6 and weigh 180. i lost 20 pounds recently

The : The dark skin under your arms could be acanthosis nigricans - a sign of Insulin resistance and type 2 diabetes. If this is the case, the best treatment is to treat the underlying disorder - Insulin resistance - which will then cause the dark areas to fade over time. You should give your doctor a call to discuss. They may want to do some screening blood work to assess whether you have pre-diabetes or type 2 diabetes and can work out a treatment plan for you. Typically, the first step is weight loss (congratulations on losing 20 lbs!) and your doctor can help with a diet and exercise plan along with giving you an ideal weight goal based on your height and build. Below, i've also linked to a website with additional information about acanthosis nigricans. Good luck!