Im 76 and have experienced this issue for at least the past 10 years. I have consulted with several dermatologists about it and even tried some laser procedure on both arms and legs to get rid of all the after effects of bruising. Nothing has worked yet. I am 110 lbs and not too thin, but just little fat under the skin on lower legs and arms, which helped cushion those areas from bruising in my earlier years. So my remedy is to focus on finding joy in other areas of my life. And that works better than anything else I have tried!