Knee pain when pressed above the patella may be related to trauma, chondromalacia patella, osteoarthritis and other diseases. If accidentally fall knee joint kneeling injury, it will cause soft tissue injury around the patella, serious will cause patellar fracture, swelling and bleeding of the surrounding tissues, there will be the symptom of pain when pressed. Prolonged excessive activity may cause patellar articular surface damage, exfoliation appear chondromalacia patella. Significant pain occurs when the patella is pressed. Osteoarthritis, rheumatoid rheumatoid arthritis, gouty arthritis and other diseases cause damage to the internal structure of the knee joint cartilage, meniscus and other injuries, and significant pain will also occur when pressing the patella. After running or climbing and other strenuous exercise, the patella above the pressure will also appear a transient pain, belong to the physiological reasons, generally can be relieved after rest. If the symptoms of knee pain when pressed above the patella, it is recommended that the patient go to the hospital to clarify the cause of the disease and receive regular treatment.