When young people experience knee pain on rainy days, it is mostly due to poor blood circulation in the body after the weather cools down, or due to prolonged sitting for a long time, resulting in poor blood circulation in the lower limbs, which leads to the emergence of pain. Rainy day knee pain can not be ruled out young people suffering from knee arthritis, caused by the emergence of knee pain. Rainy day knee pain should pay attention to the knee joint warmth, try to avoid strenuous exercise, avoid weight bearing knee joints, etc., when the weather is cool, you can also wear knee pads in the knee joints and other protective measures. In addition, you can also take anti-inflammatory drugs to relieve pain, such as ibuprofen, chlorzoxazone tablets and so on.