In the case of knee cysts, if repeated strain or trauma leads to increased fluid accumulation in the joint capsule, treatment can be done by puncturing and extracting the fluid from the capsule, and giving pressure bandages and then injecting prednisolone acetate for local closure treatment, which has the possibility of recurrence. If the symptoms are more severe or recurrent, cystectomy is performed through arthroscopy. After surgery, attention should be paid to rest and avoid walking with weight on the affected limb to avoid accidental injury. In case of tendon sheath cysts or popliteal cysts, treatment will be carried out according to the specific situation of the cysts. If the cysts are relatively small in size and do not cause pressure on the surrounding area, no special treatment is needed for the time being and observation will continue. If the cyst is progressively larger and affects the functional activity of the knee joint or the appearance of the knee joint, it needs to be removed surgically.