It is not possible to determine whether it is a high patella by oneself, and it needs to be analyzed and diagnosed by a doctor through symptoms and imaging tests. 1. Symptoms: high patella often has friction pain (more obvious when going up and down the stairs), easy to be injured (usually direct trauma to the knee is easy to cause patellar cartilage or osteochondral fracture), activity limitation (X-ray can see patellar tuberosity in the late stage, which causes roughness of the articular surface and narrowing of the gap, and leads to limitation of activity) and other symptoms. 2. Imaging examination: the diagnostic criteria of high patella is currently based on X-ray imaging performance. If the patella is found to be too high relative to the femoral trochanter, it can be diagnosed as high patella. If you have the above symptoms, you should go to the hospital in time to get a clear diagnosis and formulate a scientific program for treatment, so as not to delay your condition.