I'm new here. I hope someone can help. I have recently developed a strange splotch about the size of a dime in my groin area. It is at the top of my inner thigh and is completely flat. It is almost round and is pigmented a slightly reddish brown. I am a 42 year old female, married in a completely monogamous relationship. I am overweight but have lost 10 pounds in the last six months. I also have IBS. I take birth control pills and Metformin. I am wondering if this is some type of fungal infection, but I am freaking out that it might be the sign of something more serious. All replies are appreciated. Thank you.