A knee injury can occur in one of the constituent structures of the knee, namely the ligament, cartilage, or hard bone. A knee injury can hamper daily activities because it causes difficulty walking. Injuries that afflict the knee generally occur during exercise. ACL or anterior cruciate ligament is the most frequently injured part. What happens when you have a knee injury An injured knee can cause pain, bruising, or swelling. These three things can appear a few minutes after someone has a knee injury. Pinched nerve tissue, displacement or fracture of the knee bone, to tears in the veins in the knee, are conditions that generally occur and cause pain. Another common result of knee injuries is numbness in the lower limbs. In addition, the lower limbs or legs can feel weak, cold, tingling, bruised, or pale. A knee injury that occurs suddenly, or called an acute injury, can be caused by a direct impact on the knee. In addition, knee injuries can also occur due to being a pedestal