Some patients still suffer from joint pain and numbness after an artificial knee replacement and begin to wonder, is it because the surgery wasn’t done properly? In fact, pain after artificial knee replacement is very common, but also very complex. Different causes of pain are handled differently: 1. Within six weeks after surgery, the incision itself caused by the surgery can cause pain because the procedure is relatively traumatic for the body. This pain will gradually disappear with the healing of the incision, which is a normal phenomenon. At this time, the patient does not need too much treatment; 2. When rehabilitating after surgery, if the amount of movement increases on that day, such as walking for too long, bending too much, etc., it will cause pain. In this regard, if the pain is not aggravated after resting, the patient can continue the rehabilitation training without the need to rush to the doctor; 3, after the artificial knee replacement, some patients feel numbness of the skin on the outside of the incision, which is a normal phenomenon. In fact, the numbness on the outside of the patella of the knee is caused by the surgical incision. Generally speaking, the incision of this surgery is parallel to the leg and in a vertical position. And the nerve at the knee joint goes from outside to inside, sloping downward. Therefore, it is inevitable that the lateral cutaneous nerve will be cut during the artificial knee replacement and the patient will feel numb after the surgery. This is normal and the numbness will disappear about one year after surgery. The use of the artificial knee joint is not limited and the function of the joint will gradually improve; 4. If more new pain occurs at the newly replaced joint, such as pain caused by a fall or trauma, or pain caused by swelling cited at the joint, redness and swelling, or pain from increased skin temperature, patients should not use some blood-stasis-boosting drugs for treatment on their own, but need to seek prompt medical attention. In particular, if you have a generalized fever that accompanies the swelling of the knee joint, you should seek medical attention promptly. In short, understanding these precautions, there is no need to rush, and the knee joint function gradually becomes better.