 [ Symptoms ] how can one increase probability of getting twins [ Disease ] you have either of those possibilities 1 chondromalacia patellae which is early arthritis of the patellofemoral joint which can be felt as continuous crepititions with flexion or extension 2 meniscial injury if the clicking is one click in the range of motion from flexion to extension or vise versa get a normal xray done and mri of knee if the case is the second one physiotherapy is going to help you regain your strength and stability