The common causes of knee bending and protruding a particularly prominent bone include gout, rheumatoid arthritis, localized osteophytes and so on.
1. Gout: this disease is mainly due to enzyme and metabolic defects, reduced renal excretion and excessive production of uric acid, blood system disorders, taking certain drugs, kidney disease, lactic acidosis, diabetic ketoacidosis and other factors, manifested in recurrent joint redness, swelling, joint pain, gouty stone, occurring in the knee, looks like a protruding piece of bone symptoms.
2. Rheumatoid arthritis: the etiology of this disease is not yet clear, may be related to genetic factors, occupational exposure, smoking, pathogenic microorganisms and other factors, manifested as symmetric swelling of the joints, pain, morning stiffness, deformity of the joints, looks like a protruding piece of bone symptoms.
3. Osteomalacia: This disease is caused by the bone or articular cartilage due to strain, poor posture, weight bearing, trauma and other reasons, occurring in the knee joint, can be manifested as knee pain and stiffness, a little better after the activity, the knee joints look like a protruding piece of bone and other symptoms.
If the protruding bone increases progressively and is accompanied by more serious pain, activity limitation and other symptoms, it is recommended that the patient go to the orthopedic department of a regular hospital, combined with relevant examinations, to make a clear diagnosis and timely treatment.