Stabbing pain in the knee, if it only occurs for 1-2 seconds or lasts for a short period of time, is most likely due to wind and cold stimulation of the knee in daily life or recent high intensity sports, or due to a lack of calcium in the body. If the stabbing pain in the knee lasts for a long time, it is usually caused by inflammation, such as knee degeneration, osteophytes, meniscus damage, synovitis, knee osteoarthritis and other diseases. If this is the case, it is necessary to actively go to the hospital for an MRI examination to see which disease is causing the pain before giving certain treatment measures.