Lymphocysts may form after ovarian cancer surgery due to the collection and blockage of lymphatic fluid, which need to be actively consulted and treated under the guidance of doctor. Surgery for ovarian cancer belongs to pelvic major surgery, during which lymph nodes in the pelvic abdomen will be routinely cleared. Sweeping the lymph nodes means cutting down the lymph nodes that may be infiltrated and then ligating the normal lymphatic vessels, which may cause the lymphatic fluid to gather and result in lymphocysts after the operation, and in serious cases, they can be palpable on the surface of the body. If lymphocysts are formed after ovarian cancer surgery, it is necessary to actively cooperate with specialists for treatment and consultation. One can choose to apply antibiotics for anti-infection treatment, and the preferred drugs are amoxicillin or cefadroxil; one can also choose puncture and drainage surgery for lymphocysts and puncture and fluid extraction, and one can also use local injection of sclerotherapy or laparoscopic resection, and one needs to review gynecological ultrasound regularly to understand the changes of lymphocysts.