To dream that you have this disease does not have to be a prediction (although if you have symptoms of discomfort, it is worth a check). Cancer is a tumor, and the dream could mean that an undesired element is becoming part of yourself or is growing in excess; for example a growing obsession that can affect your personality, and even your health. Having cancer in dreams also indicates that you do not properly deal with your emotions which end up being destructive; the dream is a warning against that.
Inflammation, it is associated with diabetes, stroke, arthritis, heart disease as well as premature aging. There have been researches showing that people who gets less than six hours of sleep a night have their blood levels higher than those who get more. A study done in 2010 has figured that the C-reactive protein is higher in people who only get a few hours of sleep every night. According to Dr. Rapoport, people suffering from sleep apnea or insomnia could develop high blood pressure as well as inflammation, so treatment of these sleep disorders must be followed.
Dreams reflect our actions that we have already performed. Most of us have dreams activities relating to our past life. One of the common dreams that every individual has gone through is their experiences during the school life, where you would get images of teacher hitting you, making you feel numb and shameful.