Rattling of the knee joint during exercise, if the rattling is a frequent occurrence and is accompanied by discomfort or dysfunction. It is recommended to go to the hospital for examination and take appropriate treatment. If the ringing is occasional and not accompanied by any pain or discomfort, the following methods can be taken for observation: first, pay attention to the knee joint to keep warm, avoid excessive daily load on the knee joint or avoid strenuous exercise of the knee joint, so that the knee joint has time to recuperate. Secondly, you can carry out local treatments such as activating blood circulation and removing blood stasis, such as physiotherapy, hot compresses, gentle massage, baking electricity, spectrum irradiation, etc. All these means can promote local blood circulation, correct the undesirable factors existing in the knee joint, and restore the knee joint to a good condition. Third, in daily life, we should also pay attention to maintain a good work and rest habits, avoid eating cold, spicy food, avoid smoking and alcohol. Pay attention to nutritional intake and balance. Generally speaking, after observation, after the symptoms are relieved, attention can be paid.