Stop Scratching Me!

My two year old little boy has a very bad habit of scratching me whenever he gets upset. It wouldn't be so bad if he didn't know how to dig his nails deep down into your skin, but he does and it hurts! He also does this to his older sisters, but never to anyone else...just me and his sisters. I am ashamed to say that my legs and arms look like a battlefield due to his scratches. I know he doesn't mean to hurt me, but tell that to my poor arms and the back of my legs! If anybody out there has or has had a similar problem, please tell me how you resolved it! Please!