About 2 years ago I injured my shin during sparring. My shin collided very hard with my opponents knee and i immediately fell to the ground. I couldn't even walk on it for a while and it swelled up very badly. Anyways, i havent trained martial arts since except for BJJ.

I want to get back to martial arts but every time I run or even knock it its painful for days. I'm getting it checked out shortly but I was just wondering what it may be.

And yes I do realise how silly it was to leave it, but im getting it checked now that i want to train seriously again. Just curious as to what it may be.

The pain is a tendernish around the shin and varies in position. It is mainly painful when touched. when its real bad it hurts when doing high impact exercises such as running.

I would highly recommend that you see a doctor--after 2 years there should not be any lingering effects from your shin colliding with a knee. If I had to guess (and I am not a medical professional) you probably caused a stress fracture and it has either never healed, or has healed incorrectly due to never being treated.

Thanks and ye I'm seeing a doctor this week as I am very serious about getting back to training hard for a number of reasons, for a number of reasons. Stupid to let an injury go for so long. Hopefully it wont take too long to heal with correct treatment.

Sounds like compartment syndrome. I am just getting over a case myself. You'll need physical therapy. Next time go to the doc earlier.

I don't want to scare you but it could turn ulcerous, get it checked out, you could lose your leg.