Red dots on the chest that don’t hurt or itch are common in acne and capillaries.1. Acne: Characterized by scattered red or dark red pimples on the chest, the pimples have no self-conscious symptoms, and can sometimes be mildly painful and itchy. The red spots can spread to the back of the neck or face, can be accompanied by chest oil, pore size, acne will subside in a few weeks, subside occasionally pigmentation, easy to recur, mostly in adolescence and young people. 2, capillary nevus: the cause of the disease is not known, characterized by the appearance of one or a few bright red pimples in front of the chest, the surface is smooth, in the form of ruby. There are no conscious symptoms, usually lifelong, preferably in menopause and menopausal women, does not have any effect on the body, and is not contagious, will bleed profusely when broken, the onset of the site to avoid trauma, do not artificially gouge through the red spots.