Why does a bruise show up on my foot if i got hit on my shin?

Gravity: It it simple. When we have an injury, we develop internal bleeding which causes a bruise in the skin. Gravity draws that internal bleeding downward. That's why it is showing up in your foot.

Gravity.: A bruise is a leakage of blood under the skin. Gravity takes it "downhill". From the calf or shin, you'll see it settle in the foot and ankle area.