Check yourself all over , even the bottom of your feet. Any freckel that changes size, shape, skin texture, localized itching & color. Especially note ones that turn into a black round pencil erasure-Malignant melanoma, very deadly. I found all of mine. My drs looked right at them & assured me they were nothing. At one time I found 3 different ones. They werent listening. Biopsys proved me right, but a year between each. Could have been done all at same time. Know yourself & if your gut is giving you information. Listen to it & demand a biopsy. Better safe than sorry. That's my 2 cents!