As I age (41 now), I've seen that my body needs less sleep; currently avout 7 hours if consistent is perfect. However, if I get less than say 6 hours, nearly instantly I experience a flare-up of my perianal abcess(es). At this point (22 years since diagnosis), sleep is the one and only thing that causes or stops flare ups, even though I have been on infliximab for 7 years-ish. A blessing and a curse, but with the Seton in place, then getting the flare up down is as simple as getting a good night's sleep.