The common treatments for pleural effusion on both sides after thyroid cancer surgery include observation, drainage and medication. This situation is usually caused by the sequelae caused by thyroidectomy, and different treatments need to be taken according to the different conditions of the patients themselves. 1. Observation: If the pleural effusion on both sides is small, no special treatment is needed, temporary observation is enough, most of them can recover by themselves, no need to worry too much. 2. Drainage: When there is more fluid, the pleural fluid can be drained out to relieve the patient’s symptoms and promote recovery. 3. Medication: Infection can be prevented by applying antibiotics such as penicillin and cephalosporin. It is recommended to treat under the guidance of the doctor. If you need to use drugs, you need to use under the guidance of the doctor.