.
.
Just the one that was already hurting. That after being careful with it, tending the possible causes or contributers to the problem. The reason I think, sometimes, that the cause is a person or force? Because it only worsens when I am asleep. The ache never intensifies while I am awake.
Only when I am nicely tucked into bed. Not while walking on it (them), or standing on it, or being more active. Now, part of the reason I suggest force, as opposed to person? Because I have things blocking the path up. Blocking the stairs. Not impossible to get through. But, very difficult to replace in the order I arrange things, from the far side, once having gotten things moved to enter.