Tibialis anterior tendonitis can cause sudden, severe pain in the front of the shin, sometimes making it difficult to distinguish from an intra-articular joint process.

“you have the tibialis anterior which is this is the tibialis muscle this is the tendon and that's probably the most common discomfort I will get and what's very odd is the speed with which it can come on it's like I can be sitting at my desk doing nothing having no pain and I get up to go get a drink and I have like there's someone putting a knife into there so in those so in those circumstances sometimes it's hard to distinguish tibialis anterior tendonitis or inflammation from a process inside the joint because they're so the capsule of the joint is so closely associated”