I started donating blood when I was still in high school, and by the time I had to quit donating, I had recieved my second gallon pin. The reason I had to quit was, I was diagnosed with Diabeties about a year ago. But, I am greatful for people like you, who do donate, for last spring, I was in the hospital, thanks to a freak reaction to a med I was taking, and nearly bled to death. I ended up having to have 4 pints of blood given to me.
I have also had large bruises after donating, and it does usually go away after awhile.
Think of it this way, this is the one gift, you are giving that is truly of yourself.................