...she inquired as to what doctors ask skinny people who complain of bilateral knee swelling after low-impact activity. I'm thinking they probably just tell them to take NSAIDs, do blood draws, and schedule them for surgical intervention.

That would make a great hidden camera story. I'm sure thin and overweight people get completely different diagonoses/treatment recommendations, but it would be interesting to see how wildly they differ.

(On a related note [and I'm sorry I can't seem to keep my ranty pants off in your health-related posts], I had a similarly frustrating experience with my migraines before weather causes were considered valid. Every doctor wanted to talk to me about how I ate and how I slept and my hormones when none of those were the cause. I know doctors are experts, but sometimes you have to trust that the person who lives in a body knows a little something about it, too. )