Suggest Treatment For Bruise In The Hip

I fell down some stairs about 5 months ago and at some point after, noticed a large bruise on my left hip. It doesn't really hurt, but it is hard to the touch. I just firgured it was from the fall and would eventually heal. It still hasn't, and in the last 2 weeks, i seem to be forming the same type of bruise on my right hip. I don't remember doing anything to explain this new bruise. Again, it doesn't hurt all the time, and it feel like a hard mass when i touch it. Should i be concerened?