For severe cases, it may be necessary to drain the fluid from the joint with a needle. In very severe cases, surgery may also be considered to remove the affected bursae.Avoiding overuse of the knee joint will help reduce the risk of bursitis. Increasing physical exercise or weightlifting by no more than 10 percent a week should help avoid irritating the bursae within your knees. Take steps to avoid knee strain or injury and pay attention to ergonomics in daily activities, such your desk and work surroundings.