The protrusion of the bone on the inside of the foot, if located in the position below the front of the medial ankle, is usually a pain that occurs in the navicular bone of the foot. In this case, the patient’s medical history should be asked if he or she has suffered any sprains or contusions. If there is a history of sprains and contusions, X-rays should be taken at the hospital to see if there is any interruption in the continuity of the bone and if there is any fracture. If there is a fracture, external fixation in a cast or brace should be performed. If the fracture is in the wrong position and the displacement is more pronounced surgery is required for further treatment. If there is no obvious history of trauma such as contusion or sprain, and the patient has obvious inflammation such as redness, swelling, heat, pain, etc. on the inner bone of the foot with elevated uric acid value, go to the endocrinology department to rule out gout. If X-rays are taken in the absence of obvious contusions and trauma, if the radiograph shows congenital dichotomous navicular bone, in this case, the patient may also experience pain in the navicular area of the foot for example, after walking or standing for a long time, topical medications, such as gold ointment, should be applied for symptomatic treatment to activate blood circulation, remove stasis and relieve pain.