The pain when walking can be caused by the following reasons: first, fatigue fracture, when the metatarsal bone of the foot has fatigue fracture, there can be pain in the metatarsal bone of the heart of the foot when walking, this time, we should check the metatarsal bone of the X-ray film, CT to diagnose and early treatment; second, the plantar fasciitis, the plantar fasciitis can be the heart of the foot fascial chronic inflammation, and the pain when walking, often in the cold, tired, and the pain is more obvious in the morning when rising. The pain is often more obvious in cold, exertion, and waking up in the morning. At this time, it is necessary to have early checkup and examination to exclude other diseases for diagnosis; third, metatarsal tumor, when metatarsal bone has tumor, it can also have pain in the metatarsal bone of the foot when walking, at this time, it is necessary to check the MRI and CT of the foot for early diagnosis and treatment; fourth, metatarsal head, when there is chronic inflammation in the metatarsal head of the foot, there can be pain in the heart of the foot when walking, at this time, it is necessary to have early checkup and shoot the X-ray film to diagnose the pain. This should be diagnosed by taking an X-ray of the foot.