Bone pain below the knee may be caused by fracture, osteophyte, chondroma and so on. 1. Fracture: Fracture may be caused by strenuous exercise or under the impact of gravity, when the fracture in the fracture end or the surrounding soft tissues of the bruise stimulation, and lead to pain in the bone below the knee. 2. Osteomalacia: Osteomalacia may be caused by long-term excessive movement of the joints, when the joint capsule is overstretched, resulting in cartilage wear and tear, so that the joint surface is uneven, and when the wear and tear is aggravated, it will stimulate the nerves and cause pain in the bones below the knee. 3. Chondroma: chondroma may be caused by heredity, when chondroma destroys the bone quality of the knee, it will produce bone pain below the knee. Pain in the bone below the knee may also be related to arthritis of the knee, herniated disc, etc. It is recommended to consult a doctor to confirm the cause of the disease and then follow the doctor’s instructions for treatment.