I havent had a pain free day in some 12 yrs- so good day/bad day is indeed just a qu of levels of pain-
on a good day I can walk 1/2 to 3/4 mile, with pain though with every step and with constantly checking and rechecking gait and posture (but to see me you wouldnt know that at all), before I need a rest and/or before pain/walking gets worse / can do dishes (like 6 plates, 5 mugs,3 glasses, 2 pots) without pain getting worse for long after, actual doing it is always rather painful, doing some 10-20 minutes cleaning in one go etc
and 'overdoing' on a good day ...

... well last night I was 'stupid' and did some tidying and light cleaning for some 45 mins non stop , I was on a roll

, and owwww today fingers are swollen to massive sausages, hands/arms tremor/shake, hands/arms/shoulders/back pain are v 'unpleasant' (once upon a time I would have called that pain level 'massive/evil etc' and wouldnt have done anything today- but today I shall do less than planned and do things in 5-10 mins increments...)
so 'good day' now is a trillion miles away from even just a 'normal' day pre HMS....sigh...
xxg