Knee meniscus injury with effusion, pumped 4 times, whether the need for fluid extraction treatment, need to review the knee CT or MRI, to see the situation of the knee joint effusion, a small amount of knee joint effusion, do not need to be extracted again, if the amount of knee joint effusion is large, you need to continue to extract. Knee meniscus injury for fluid extraction, if necessary, local intrathecal injection of sodium vitrate, fluid extraction needs to be localized pressure bandage, reduce the knee joint activities, in order to prevent the knee joint effusion continue to generate, after the above treatment, the knee joint effusion is still a lot of fluid, it is necessary to consider arthroscopic meniscus clean-up surgical treatment. Knee meniscus injury patients, usually if there is discomfort, it is recommended to go to the hospital in a timely manner, do not be careless, so as not to delay the treatment, affecting the therapeutic effect.