My inexplicable bruise(s)

I am not sure if bruises are contagious.
But I started off with 3 relatively small ones.
Today, I have f-i-v-e.
The 3 small ones went on to become big bruises.. and the 2 new ones are small as of now.

Try as I might.
But I cannot recall where all those 5 disgusting looking bruise came from.
I mean I have faint ideas, but it ain't conclusive.

This leaves me wondering.
Do I bruise easily? Or am I just clumsy?

I especially hate it, when the bruises are greenish after a couple of days.
I mean, it looks as if I've been seriously abused.
The last time I had this many bruises, I had them on my legs. Now hands?
Perhaps that's why I get weird looks on the train.