Skin marks can be a sign of serious health conditions. There are tiny red spots which can appear on the chest and arms. They are named ruby spots and are very common among people between the ages of 40 and 45. However, the spots can appear in adolescent years, too. Those are actually mall capillary dilations that come up because of vascular system failure. They can appear scattered on the skin or concentrated on smaller areas. In case they are focused on a smaller area, then it means that they may be benign tumors.
Should you worry about them?
The spots are not carcinogenic, thus you should not worry about them as they represent an aesthetic issue. This can be resolved with natural cures that you can find online.