Thanks again Dama, for the quoted info! The doc did mention the bursa I think. I know he did feel a little fluid build-up. It continues to get a little bit better every day, and I'm icing it now, and a cream similar to the one you recommended was available on Amazon Prime, called Penetrex, and will arrive today, so I'll use that until the tropicin (pecado poético?) arrives sometimes next week. I'm thinking I may curtail the walks until the knee's completely pain-free. I'm off my running rhythm now, sinking back into sedentariality (linguistics have a license to make up new affixal derivations). And I've finally found a use for the Pro-Tec ITB strap I bought when I mistakenly thought I had ITBS--it keeps the cold compress in place. I don't have any arthritis in the family, and the doc said he didn't see any, so I'm discounting that possibility for the time being. I'm thinking more and more that I just wasn't warmed up properly and landed with the ligaments or something a little misaligned. Feels like the kind of thing that would happen in a sport like football or soccer while making a cut, except I was running straight ahead. Anyway, it's kind of fun pushing the weights a bit during this running hiatus, but I'm a bit worried that I'm no longer chomping at the bit to get back out there. I'm also not enjoying the idea of building up again for the second time in two months once I can run again. I had finally reached one of my short term goals--running to, around, and back from Como Lake at a decent pace. I don't want to wait too much longer before I can do that again.
P.S., haven't ever tried a salt bath, but did have nice romp in the Jacuzzi last night with the fam, with a belly full of beef and red wine. Is that therapeutic?