To dream that you have cancer, denotes hopelessness, grief, self-pity, and unforgiveness. You feel you are wasting your life away. This dream also represents areas in your life which are bothering you, disturbing you, and hurting you in some emotional way. To dream that you are being treated for cancer, signifies a positive change in your life. To dream that someone has cancer, indicates that you need to change your negative way of thinking before it creates a cancer in you. Start being more positive. To dream that someone is a Cancer, symbolizes your tendency to keep and hold on to everything. You hold a lot of power and influence. The Cancer sign also indicates that you tend to be moody and emotional.