A small cut may be deeper than a graze but it is usually the least problematic thing to heal. Initial bleeding will flush out impurities and then stop on its own accord. Fixed with a plaster, the smooth edges of the wound will generally grow together neatly (primary wound healing). A graze, on the other hand, may only affect the uppermost layer of skin (the epidermis) but its treatment is often complicated by foreign objects and dirt as well as heavy weeping.
Cuts and Grazes: A Common Injury