It's remarkable how long you can fight on with a niggle, telling yourself that it's not getting worse, and will clear up any time soon.
I've been carrying a slight piriformis niggle for a while, and it has been getting noticeably worse. It hurts like mad first thing in the morning (before some slightly painful and cautious moving around). The pain is the stereotypical slight butt pain and feeling of torn muscles down the back of the leg- but has been easy to rationalise away as it hurts a lot less during/after running.
Anyway, it has been getting worse, sneezing first thing is enough to make me whimper in pain, not good. I have reluctantly been taking a break for the last week, and went to see my lovely and capable osteopath/sports massage person. She prodded, poked, waggled and stretched. Worse yet, she agreed that taking a break from running for at least another week to see how it goes was a good plan. The worst part of this is that it's obviously rational and correct, buggrit.
Meantime, I have been given some sensible stretches to do, and will be using my foam roller (which is very lovely and firm, with a hard core) to give the piriformis a careful poke; hopefully this is more gentle than the polo ball that usually does the trick for getting into deeply buried muscles.
I have probably been carrying this around for at least a month or two, getting steadily worse, and too stubborn to admit it. I should know better. Most of you lot know better, too, but I'm willing to bet that you have done just as badly on occasion.
Bottoms to it.