Extensor tenosynovitis is one of the running injuries doctors don't often talk about simply because it's a relatively rare condition. 

But extensor tenosynovitis can be really painful when running. 

Sometimes it's actually misdiagnosed as a stress fracture, both by doctors or by the runners themselves. 

Any misdiagnosis can force you to take time off of running unnecessarily.

Today on the Doc On The Run Podcast, we're talking about three foot types that are prone to extensor tenosynovitis.