Are you a woman who works night shifts? If so, you should get screened for breast cancer. Women who work night shifts have a higher risk of breast cancer than those who work day shifts. It might be because exposure to light at night disrupts our body's circadian rhythm. Circadian rhythm is your body's clock that tells your body inside when you should wake up, sleep, or eat depending on what is happening outside of the body over the course of twenty-four hours. It is important to have a healthy rhythm because when you don’t, you may feel more tired during the day, you may have a hard time waking up or going to sleep, and it affects your ability to concentrate. The disturbance in this Circadian rhythm reduces melatonin level in the body. The reduced melatonin alters the production and action of the female hormones and increases the chances of breast cancer.