Ouch, the day after

So I was woken up around 6 am by my four year-old jumping around my bed looking for cuddles and entertainment from my wife and I. Besides having to pee, man I hate that, waking up early having to pee, because you know you have to get out of bed and you are not going to get back to sleep.
More importantly after spending yesterday doped up and a little giddy that the source of my anguish had been rooted out of my face I forgot what it's like to wake up in pain. Even these past couple of months with my sinus and tooth issues they would usually get worse as the day went on, peaking in the mid-afternoon, this morning however it was like the pain had been storing itself up for the six hours I was asleep just waiting to kick my ass as soon I awoke.
To me pain always feels worse after you've been using painkillers, of course constant pain is in reality worse than intermittent pain, with constant pain one kind of resigns themselves to the situation, the pain that comes after the painkillers wear off seems almost impetuous, like god didn't I deal with you already, then you have to figure out what painkiller to take, I haven't eaten yet, and I have to drive the kids, get the house ready for company, damn no hydrocodone until bedtime.
Also the term painkiller had to be created by a marketing department, they are really pain blockers, right? What happens to the pain while it's being blocked, where along the line is it blocked, is everything happening the same but I just don't feel it? I'm getting into old school Seinfeld territory here so I'll stop and try to remember to ask some of the Pharma Industry people that are in my family what the whole deal is with how painkillers work.