The sinus tarsi is “the eye of the foot”, an opening on the outside of the foot between the ankle and heel bone. This canal contains ligaments which can become inflamed if put under undo stress such as high-impact running, jumping, or simply running with bad form. The pain associated with this is called “sinus tarsi syndrome”.
I know all this because I went to have my left ankle looked at by my GP who diagnosed me with sinus tarsi syndrome, apparently very common among sporty people (like me? hah!). Last night he injected some steroids into my sinus tarsal to calm down the inflammation. The procedure was painless, until he said “I’m very deep in the sinus cavity now”, at which point I became a little nauseous. I recovered quickly after a short rest on the couch and a large glass of red wine.
If all goes well I should be able to run again in 10 days time. Here’s to hoping…
Link to Sinus Tarsi Syndrome on Orthoteers