... side of my knee and my hip bone. I also have a small green bruise on my left breast and brown bruising over my calves and thighs. All of this has appeared within the last 2 weeks. I really don't know how I got them as I have had no recent traumas or bumps. The only thing I can think of that might be linked to the bruising is the exercise I do at the gym. I go on the elliptical trainer for 40 minutes 4-5 days a week, but I being doing exercise for 3 months and It don't make sense that the bruises are only appearing now. If you know what this is then please help me as I'm stating to get a bit worried now,Thanks