Hi, It is normal to experience some discomfort and swelling after a knee scope surgery. However, persistent throbbing pain in the knee, particularly at night, maybe a sign of an underlying issue. Some possible causes of throbbing pain after knee scope surgery includes infection, blood clots, or damage to the joint during the procedure. It is important to seek medical attention if you are experiencing persistent or worsening symptoms, as your healthcare provider may recommend further evaluation and treatment. This may include diagnostic tests such as imaging studies or blood work, as well as medications or other interventions to manage your symptoms and prevent potential complications. In the meantime, you may find relief from your symptoms by elevating your leg, applying ice to the affected area, and taking over-the-counter pain relievers such as acetaminophen or ibuprofen as directed. It is also important to follow any post-operative instructions provided by your healthcare provider, including physical therapy or other rehabilitation exercises, to support healing and recovery. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician