Started off with ITB on right knee. The ITB pain has now gone but other niggles now in its place. Mainly right, but sometimes left.

Always had some form of pain/discomfort on one knee or the other.

I can normally run through it and get no pain when running. Since I've been off this time though these niggles have been painful enough to stop running + this time get pain behind kneecap on downhill heelstrike.

Suspect it's all related to the same problem: over-tightness in quads, glutes, etc.