Pain only got worse in this right calf, behind the knee, and up into the hamstring. Not sure what the hell I did. It is more stiff and painfull the next day, almost like a knee injury. About 2 months ago I tore some amount of my popliteus ligament/muscle, and this feels like the opposite end of that, the medial back of the Tibia head. This seemed like simple muscle pain/cramping while running but is obviously some torn tissue that wants to immobilize and repair itself.