I have a red dot on my chest. Shainhouse says these common, cherry-red bumps on the skin are made up of a group of dilated blood vessels. "We are not sure why they pop up, but most people start to slowly develop them by age 30," she says. "They are not dangerous and are not generally itchy or painful and do not usually bleed. If people get them at 30 why do I have one at the age of 13?