So far it doesn't have a name

I have developed a muscle knot on my right shoulder. Of itself this would not be an unusual occurrence every couple of months, but this one is pretty huge. If I turn sideways, I can see it in the mirror. It hurts a fair bit, and I estimate it would take a skilled masseuse a good couple of hours to remove.

I don't know where it came from, but I'd really like to, because then I could inflict some kind of damage on this source, or avoid that situation in the future and spread nasty rumours about its mother.

Mokalus of Borg

PS - I don't actually spread nasty rumours.
PPS - And I don't tend to inflict damage on things on purpose, either.