The healing time for an inflamed knee depends on the severity of the condition. Mild inflammation usually takes about 2 weeks to recover, 1 month for more severe cases, and 3 months for more severe cases. 1. If the degree of knee arthritis is mild and there is only swelling and pain, and there is no limitation of activities, generally through oral non-steroidal anti-inflammatory drugs such as aspirin, nimesulide and so on to relieve, at the same time with the physical therapy, acupuncture, two weeks or so can be recovered. 2. If the degree of inflammation in the knee joint is more serious and a large amount of fluid has formed in the joint, it cannot be cured by conservative treatment at this time, and surgery is usually needed to extract the fluid, followed by anti-inflammatory and anti-infection treatments. This process usually takes one month. 3. When knee osteoarthritis is severe enough to cause deformation of the joints and restriction of movement, joint replacement surgery should be considered, and recovery in this case takes about three months. The recovery time for knee inflammation cannot be generalized and should be judged according to the severity. The above medications should be taken under the guidance of a medical professional.