1. If you're dreaming in a dream, this is a warning that your head's in the clouds. Your imagination may play a bad trick on you and soon you won't be capable of objectively telling apart dream from reality..
2. Dreaming in a dream briefly could be a sign that you'll soon see some of your dreams coming true. Dreaming in a dream frequently is a sign that you're worried and indecisive, with this having a negative effect on your relationships with people and on your work..