This is pain and inflammation along the inner border of the shin bone. Symptoms: Tenderness along the length of the shin bone, especially during or after running. Common causes: A sudden increase in training, or too much training on hard surfaces. Weak or tight muscles around the foot, shin and calf. Poor technique � overstriding in particular. What to do: Ice and massage of the sore area and / or calf areas. Address any strength or flexibility issues in the muscles along the front and back of the lower leg and foot. Consider having your running gait and shoes assessed.