The symptoms of osteochondrosis are localized swelling, pain, and most commonly, fluid in the knee joint. The patient’s knee joint may feel swollen and painful, and the swelling may be worse when the patient extends and flexes the joint, and the swelling may be so severe that the patient may not be able to flex. This can be treated by intra-articular aspiration, or by arthroscopic surgery, which can be used to remove the fluid and synovial membrane from the joint, or by injecting a small amount of hormonal medication into the joint cavity to help absorb the fluid. If the patient is due to an infection, anti-inflammatory treatment is required.