The foot does not hurt when you do not walk, but when you walk, you experience pain. The most common causes are injury, strain, and inflammatory reaction in the foot, and these pathological changes are likely to cause pain after the corresponding activity. Strain injury is often the result of excessive foot activity, long-term cumulative injury, resulting in local tissue pathological changes, such as congestion, edema, and even inflammatory reactions, including long-term cumulative injury is more serious, resulting in local scar contracture, adhesions, and so on, which can easily lead to the aggravation of these pathological changes in the activity, resulting in the corresponding pain symptoms. Injuries due to ligament injuries, soft tissue injuries, or even bone injuries, can cause aggravation of the injury by subjecting the injured area to a certain amount of pressure and load during activity, resulting in pain. Inflammation is a more widespread pathological change, such as localization of injury, localization of strain or rheumatoid arthritis due to immune factors, and other conditions, can lead to local inflammatory reactions. This often causes local swelling or increased inflammation during activity, resulting in painful symptoms. When these three diseases are relatively mild, local braking and inactivity do not cause corresponding irritation and inflammation, so they usually do not produce painful symptoms.