Thin skin pressure or scrape bruses. They proove you are active, lifting, bumping, a life of hard knocks. I'm 84 and do lots of (dumb) active things-running, dumbells, 40 pound bags of bird seed and so on . I may not do them well, clumsy, balance problems but they are sort of badges I get by doing hard things to do. However, if they bleed treat them like a regular wound, wash, dry, neosporin (or similar) and a band aid or two. If embarressed, long sleeves, pants or high socks may be in order. My own opinion is if people don't like to look at them--TS.