Knee instability easy to flash need to be treated according to the cause of the disease, generally have rest, avoid weight-bearing, local hot compresses, baking and other physiotherapy, oral celecoxib and other non-steroidal anti-inflammatory drugs, if necessary, take surgical treatment. 1. Excessive fatigue: due to the patient for long-distance running and other strenuous exercise caused by the patient’s knee attached to the muscle fatigue, the patient can appear after the fatigue of the knee is unstable and easy to flash, this situation does not require special treatment, after resting, elevation of the patient most of the patients can be relieved. 2. Trauma: due to trauma or sprain caused by knee meniscus, peripheral ligaments and nerve damage, the patient can appear when standing knee instability easy to flash. When the injury is mild, it is recommended to take rest, avoid heavy walking, immobilize with plaster and brace, and use anti-inflammatory and pain relieving drugs such as Celecoxib if necessary. If the injury is more serious, patients are recommended to undergo surgery. 3. Knee degeneration: Due to degeneration, hyperplasia, sclerosis and other changes of knee cartilage, some patients may have unstable knees that are easy to flash. Conservative treatment is the mainstay of treatment, including avoidance of weight bearing, localized hot compresses, baking and other physiotherapy, oral celecoxib and other non-steroidal anti-inflammatory drugs, glucosamine and other cartilage protection agents. Conservative treatment is ineffective or the pain worsens, surgery can be considered. Knee instability is easy to flash suggest timely consultation, with the help of the doctor to clarify the cause of the disease, and targeted treatment or therapy. The above drugs need to be used under the guidance of a doctor, avoid self-medication.