If a horse steps on your foot, the immediate result will likely be severe pain and possibly serious injury. Depending on how hard it stepped on you, the force of its hoof could cause broken bones or crush soft tissue like muscle and ligaments. In addition to physical trauma, there is also the potential for infection if bacteria from the animal’s hoof enters open wounds in your skin. It is important to seek medical attention right away if this happens so that proper treatment can be administered. Treatment may include antibiotics, rest, splints or casts to support fractured bones, as well as ice packs or other measures to reduce swelling and manage pain.