I've had sacroilleac pain off and on every 1-3 months for the past 2 years. I sometimes feel it when I wake, and oftentimes it dissipates once I get up and walk around, within an hour. Othertimes it will persist 1-2 days but not usually painful enough to warrant medication. There were 2 episodes lasting a couple days which I did take 1000mg Extra Strength Tylenol twice throughout a day.
BTW, I have experienced moderate sacro pain whilst on a fairly consistent stretch while taking 500mg Curcumin and 500 Boswellia--I haven't yet pinpointed an affective herbal maintainence regimen. Perhaps more heroic dosages, though some sources/brands aren't reliable or guarenteed to be free of metals etc. I may try to find a proper brand/dosage for Devil's Claw. This has gotten good press for joint pain issues.
This fall I experienced the worst episode yet--hopefully ever. It had a latter day onset from about 3pm until 10pm when it got rather excruciating. I spent the early evening on the couch, numbed by the flicker rate of the TV, and once I tried to get up, I stepped into a world of pain. Laying down was impossible--even straddling a body pillow--unless I didn't move an inch. Somehow I drifted off after 3am, or so.
What set this apart was how visibly decrepid I looked, doing a half-stride limp, as it affects my left sacro/ALA area usually (sometimes both sides, though). Since I was diagnosed 7 years ago, I haven't noticed joint pain elsewhere. The pain was off the scale, and I had to stop and brace myself between every step on the stairs. The Tylenol didn't work whatsoever.
The following day I immediately hobbled to get pain meds--after not seeing a doctor for six years, it was surprisingly easy. Later I got an HLA test for ankylosing spondiltis which turned up negative. The intense pain lasted 3 days but didn't dissipate until the 5th day. I took the hydro twice a day the first two days. Once a day the next three days. So long as I didn't move much, just sat upright, the pain didn't warrant the hydro. I'm not a big fan of any medications, and I'm not so sure Acetaminophen doesn't aggravate MY Crohn's.