In most cases, the suprapatellar bursa fluid is connected to the fluid in the joint cavity, mainly due to the increased pressure in the joint cavity and the fluid entering the suprapatellar bursa. In most cases, joint effusion is mainly due to osteoarthritis or synovitis of the knee joint. First of all, conservative treatment is possible. It is important to take active rest, avoid prolonged standing and walking, avoid excessive exercise, especially climbing and ascending, and keep warm to avoid getting cold. You can use Chinese herbal medicine to activate the blood to apply hot compresses and scalding. You can use knee pads to fix the knee when walking and take it down when resting. You can also take oral medication to invigorate blood circulation, such as Palsy Capsules, and lymphatic venous reflux medication, such as Mai Zhi Ling Tablets. If the fluid accumulation is small, it can be absorbed on its own. If the fluid accumulation is large, the fluid can be extracted through puncture and injected with hormonal drugs, which also has a good effect, and if necessary, surgery can be considered to remove the suprapatellar bursa.