if you are awake from the hours of ten pm to four am if you're awake for two hours between ten pm and four am for two days per week for twenty five days of the year you qualify as a kind of card carrying shift worker and you likely have significant circadian disruption you are at risk for some of the you know it's not going to happen tomorrow but if you continue on that pattern that i just described you are putting yourself at increased risk for cancer and cardiovascular disease metabolic dysfunction um you know you can have trouble having children it impacts fertility mental health psychiatric disorders there isn't disease or disorder that circadian disruption doesn't touch