I am getting black marks around the neck and in the armpits. My height is 5'5" and my weight is increasing day by day to 83 kgs now. I think I'm suffering from insulin resistance. Please confirm and suggest which tests I can go for verify. Also, any medicine to control insulin resistance in the body. I'm doing regular exercise and eating a healthy diet with veggies but till now no improvement. Doctors will list out long list of tests which will cost me very high. Please suggest the right tests which I can go for in this covid situation.