The main reason for a Bilateral Total Knee Replacement is severe arthritis that causes pain and stiffness in both knees affecting the patients ability to carry on with basic day- to- day activities and significantly reduces one’s quality of life. The pain makes even the simplest of tasks like ‘bending to pick something from the floor’ difficult for the person. Their conditioned is worsened if they have to pick heavy weighed things. Arthritis in knees is a progressive condition and usually worsens with time. A person choses to go for simultaneous procedure when they have significant deformity of both knees. Having them corrected simultaneously helps the patient recover faster and allows them to walk straight again soon.