I have sort of red pimples on both of my forearms, shoulders, thighs & on the inner region of my upper arms.There are "numerous" number of them from very small to quite larger sized ones. They get alot itchy at times of the day. Some of them start turning a bit brownish & they also have a rough kind of feeling when i run a finger over it, basically, it's not smooth as my skin. I dont want to tell my parents. "Please" help me by telling what is the cause of this & what home remedies could i do?