Treatment of the suprapatellar capsule of the right knee as well as the joint cavity effusion needs to be based on the specific cause of formation. If it is caused by an injury in this location, the blood collection inside is usually aspirated appropriately and then bandaged with pressure. In the case of fractures, external fixation in a cast or surgical incision and internal fixation should be performed. In case of meniscus and cruciate ligament injury, external fixation in plaster or meniscus revision and reconstruction of the cruciate ligament should be performed. If the inflammatory effusion is due to local strain or inflammatory lesions, aspiration with an empty needle and injection of Depo-Provera (also known as Betamethasone) into the joint cavity can be performed to reduce the inflammation in the joint, and after the inflammation is under control, an intra-articular injection of sodium vitrate can be given to lubricate the knee joint and promote the recovery of knee flexion and extension. At the same time, mannitol and dexamethasone injection can be given intravenously for dehydration and anti-inflammation. Oral medications such as sodium hepaticoside tablets can be used to increase blood circulation and promote the metabolism and absorption of inflammatory metabolites.