My hands generally look normal in dreams - I know this because one of my reality checks is to look at the ring I wear on my left hand. Usually, if I'm dreaming my actual hands look normal, but the ring will look weird - it has an abstract squiggly pattern on it in reality, but in dreams the pattern will shift and change and often turns into words or letters. (I also had a henna tattoo of a snake on my wrist for a few months, and in dreams I could make the snake wriggle around and even crawl off my skin...)