I have been physically active for over 4 months and never had this problem before... Earlier this week I went on a 9 mile bike ride (which is nothing compared to the amount of exercise I do in the gym) and after I got back I had several bruises on each of my calves. I didn't get in an accident or anything, in fact I don't remember banging my legs at all. I know everyone has random bruises appear every once in a while but there are quite a few of them so I was a little concerned. So I thought maybe I'd strained my muscles or something... could that cause bruising? If so should I be worried? I don't have insurance, or money, or a doctor for that matter so getting a medical opinion is out of the question at this time, which is the reason I don't want to persist in this if it's damaging my muscles too badly.