There are two main reasons for the slow recovery after a knee fall: First, the patient’s own poor health, slow recovery due to age or poor nutritional status, and irregular diet, etc. Second, the injury is more serious, causing serious damage to the bone or meniscus and cruciate ligament. Recovery is also very slow without systematic treatment and braking. Therefore, if you have a knee injury that is slow to recover from a fall, you should go to the hospital and be checked for more serious injuries. Common injuries such as meniscal tears, cruciate ligament ruptures, and lateral collateral ligament injuries can be very slow to recover or even cause sequelae if they are not treated properly and sometimes require surgery. In addition, the patient’s physical condition should be examined, including nutritional status and biochemical levels, so that the cause of the slow recovery can be found and then addressed.