The most common causes of constant pain on the top of the foot after smashing are skin injury, muscle injury, fracture and so on. 1. Skin injury: If the top of the foot is smashed and the skin is broken, and the wound is not treated in time, it is easy to become infected, and then there is persistent pain on the top of the foot, and it is necessary to treat the wound in time. 2. Muscle injury: If the surface of the foot is smashed and there is soft tissue damage, it is easy to cause local inflammation, and then there is persistent pain or swelling on the surface of the foot. 3. Fracture: if the patient’s foot smashed after a fracture, it is easy to appear on the surface of the foot persistent pain, the need for timely X-ray examination, after the fracture also need to be fixed in time for the reset. The top of the foot has been smashed after the pain in a timely manner to recommend timely to the hospital to identify the cause of the disease, by the doctor targeted treatment, so as not to delay the condition, resulting in physical damage.