I think for most of us its taken as read we are in pain. We've been that way long enough its become part of the daily routine, not just for ourselves but those who live with us, i don't think that they don't want to sympathize its just become the norm unless you are have a particular bad day or something new comes to join the cacophony of noise that is our pain. Also we carry on, we continue to do the things we normally do, all be it a bit slower, we manage and say little about it. So I do think, sometimes, we have created the situations ourselves to some extent.
When generally healthy people get struck down with something painful its a shock to the system and its takes time for them to adjust, by then they are generally better till the next injury or mishap. So of course they swear and moan and complain constantly, we however have been accustomed to our lot and already know complaining doesn't help anymore coz what we got generally does not go away no matter how much we moan. only people like us can understand people like us, thats why i'm so glad we have this place to get things out of our system.