How did I get that bruise?

(Chapter 3 Memory Problems in my book)

Sometimes I find bumps or bruises on my body and I usually don't remember how or when it happened. I might find them while I'm taking a shower. Then I will wonder how and when I got them? I think that most of the time I really can't figure it out.

Recently I was washing my face and my forehead hurt while doing this. I looked in the mirror and I saw a bruise where I felt the pain. I have no idea how I got this bruise! All I can guess is I must have recently banged my forehead on something. I know that this has happened before but that doesn't mean that this doesn't frustrate me!