The burning sensation on the outside of your knee that starts around mile three, fades with rest, and returns the moment you push volume again — if you recognize that pattern, you already know how disorienting iliotibial band syndrome can be.

If you have been told you have a bipartite patella, you've likely received one of two responses: "it's usually nothing" or "we'll manage the pain." Neither answer is particularly satisfying if your knee keeps flaring up during sport, after a long walk, or simply climbing stairs.

A venous malformation in or around the knee is not simply a bruise that won't heal or a vessel that misbehaved once. It is a structural anomaly — a tangle of abnormally enlarged venous channels that developed during embryogenesis and, depending on its size and location, can press against tendons, fill joint spaces, and create a persistent low-grade state of internal clotting that has little in common with typical knee problems.