Seed bone is the normal growth of human beings, it is a kind of endogenous small bone formed by the ossification of the tendon where the pressure is relatively large. The role of the seed bone is mainly used to strengthen the tendon, to avoid wear and tear of the tendon in the process of sports and heavy physical labor, in fact, it is a kind of tendon ossification, that is, the place where the pressure is relatively large this piece of tendon automatically ossification, mainly wear-resistant. Everyone has the seed bone, in fact, is also the largest seed bone in the human body, is the patella, the patella in front of the knee is in fact also the seed bone, everyone has, other parts of the seed bone some people have, some people do not have, is not necessarily, depending on what kind of labor usually engaged in or engaged in what kind of work, usually occurs in the bottom of the foot, some people have, some people do not have.