About 4 weeks ago I've been scratching my back and my stomach and I didn't pay any mind to it . Then I looked in the mirror and noticed dark shiny spots that were quickly spreading over time all over my chest and back and by the 3rd week it's been appearing on my arms but more like rashes and more dark itchy spots on my thighs . I have no I idea why these spots are appearing  . Slowly after time these dark and shiny spots became dry and developed a scab .  When I peel and scratch them off they're still dark and shiny underneath . I'm a 14 year old female . I'm really embarred to tell any of my family members .