The neck of the foot is anatomically the ankle part of the human body. If this part is painful, it can be divided into these cases: a. Exclude whether there is any trauma or sprain in the patient’s ankle, thus there is a possibility of fracture of the inner or outer ankle or the posterior or anterior ankle of the ankle joint. It is possible to dislocate, subluxate or separate the lower tibiofibular joint when it is very painful, which can be confirmed or excluded by taking radiographs. It is also possible that the medial and lateral ligaments of the ankle may be damaged, which requires physical examination or MRI. It is possible that the patient has flat feet or chronic strain injury, resulting in ankle arthritis, traumatic arthritis, etc. The patient may have rheumatoid arthritis or ankylosing arthritis in the ankle joint. 4. The patient may suffer from bony changes, such as osteoma, endogenous chondrosarcoma and other disorders, which need to be examined by X-ray or MRI for differential diagnosis.