I'm 50 and in fairly good shape for my age. I also have a high platelet count, do not bleed or bruise easily and am a regular platelet donor. I exercise on weight machines (not with free weights) and the handles have padding on them. However, after doing the bench press the other day, I had a bruise on my hand. It appears to have developed into a localized, blood-filled swelling under the palm of my hand. Is this common? Is there a good way to treat it? Any ideas would be greatly appreciated. Many thanks in advance, Peter.