Knee sprains usually take about 1 month to heal on their own. However, severe joint sprains require treatment for gradual recovery and the recovery time is uncertain. In the case of minor knee sprains, which are often accompanied by symptoms such as synovial congestion and inflammation, it may take about 1 month to heal on its own. For serious knee sprains, such as injuries to the meniscus, cruciate ligament or lateral collateral ligament, you need to go to the orthopedic department of a regular hospital for systematic treatment as soon as possible, and it will take at least 2 months before you can return to normal. To fully recover, it will take longer. Due to the different severity of knee sprains, there is a certain degree of specificity for each patient, and the recovery time is not uniform and varies from person to person. When a knee sprain occurs, it is recommended that the patient go to the orthopedic department of the local regular hospital as soon as possible, so as not to delay the treatment of a good opportunity.