I had one in late 90's. Its what caused my fibromyalgia to kick off. Worst part was 2am,
PAIN and I was admitted to hospital 9 times in 3 months.
Finally got on list for operation to stick small ultrasonic hammer on a tube up my errr, thingy, but as luck would have it, I passed mine THREE days before I was due to go in !!
and yes, Im sorry to report that peeing it out was just as excruciating as the pain in my back
but then I wept with relief, real tears !!!
You sir, have my full and complete empathy and sympathy
Good Luck.