There are two main reasons for pain in the plantar muscles: first, due to injury to the plantar muscles, for example, when performing strenuous sports jumping, due to the violent force of the plantar muscles, there is a risk of strain, or the moment of landing from a high jump the muscle tissue is violently contracted, which can also lead to strain of the muscles on the bottom of the foot. Local swelling and inflammatory edema will be formed, which will stimulate the peripheral nerves and cause pain in the plantar muscles, especially when the activity is carried out, this pain is obviously aggravated. The second condition, due to strain on the plantar muscles, such as walking long distances, resulting in continuous fatigue of the plantar muscles to form a strain, or a cold condition on the bottom of the foot, resulting in slowed blood circulation and inflammatory accumulation will produce painful symptoms. In the third case, it may be due to the sole of the foot is a flat foot, this situation because the arch is shallow, so it is easy to cause muscle tissue fatigue, will also be easy to cause muscle pain.