 Hello, I am Dr. Sunil Kini, consultant joint replacement and arthroscopy surgeon at Manipar Hospital's Bangalore. It is important to note that post knee replacement, it is normal to have pain for about 3 months after surgery, albeit that the pain actually decreases over the period of time. But there are some ways in which the pain can be taken care of. Firstly is the judicious use of analgesics or anti-inflammatories as prescribed under the eyes of your surgeon. It is also important to note that certain activities like your physiotherapy on a daily basis can reduce the swelling and subsequently the pain as well. Also the use of icing is regularly being practiced to reduce the swelling and the pain both in this scenario.