If the foot sprain is not fully recovered after several months and is accompanied by pain, it is best to go to the hospital for further examination, such as the most common clinical ankle sprain, and if the pain is still present after the infusion, it is best to go to the hospital for an X-ray or even a local MRI to clarify whether there is an undetected fracture or a ligament injury that has not healed well. Clinically, this is most often a ligament injury that was not detected on early radiographs and therefore did not undergo regular treatment, and the ligament remains lax or the attachment point of the ligament does not heal well, making the patient’s joint unstable and thus painful when walking. In such cases, an orthopedic surgeon needs to evaluate and, if necessary, re-fix the ligament with a brace or even combine it with surgical treatment to restore the tension of the ligament and stabilize the joint before the pain can be relieved.