My aunt is in her 50s. She studies using her laptop. She is a night owl and sleeps at 3 or 4 in the morning. However, she has to wake up at 5 am every weekday to make breakfast for her husband. Then she goes to sleep again until 3 or 4 pm. Recently, she started to have dizzy spells once per day. What will happen to her? Will she get cancer? If she reverts back and have a normal sleep schedule, will it help?