Shin splints are caused by very small tears in muscles of the leg at their point of attachment to the shin (The lower leg).

Posterior shin splints occur on the inside (medial) part of the leg along the tibia. Pronation contributes to posterior shin splints.

Anterior shin splints occur in the front portion of the shin bone (tibia). Anterior shin splints are caused by muscular imbalances, inadequate shock absorption or toe running. Pronation contributes to anterior shin splints.

A shin splint sufferer may feel an aching pain after a brisk walk or running. If untreated the pain may become more intense. Small bumps and tender areas may become evident adjacent to the shinbone.