There are several reasons for the soreness of the foot muscles: 1. Due to strenuous exercise or long-distance walking, the foot muscles, tendons, ligaments and other soft tissues are slightly strained and strained, resulting in the gradual formation of inflammatory edema and slight bruising and swelling, resulting in local inflammatory metabolites stimulating the surrounding soft tissues and causing soreness. 2. The foot will become tense and the blood circulation will slow down after the cold, resulting in the accumulation of inflammatory metabolites due to the slowing down of venous return and the painful sensation after the stimulation of the surrounding tissues. 3. In addition, the foot will become sore due to the consumption of energy and nutrients as a result of strenuous exercise. After getting cold, the local arterial blood supply decreases, which makes it easy to have insufficient energy support and soreness.