Docs In House Section

Wey them!!! EMERGENCY K-LEGS/KNOCK KNEES Please bvs I need your opinion, last year middle my son's knees started bending without cause, as the day is going its becoming Worse.I went to the hospital and doctor wrote something like "Bil. Comm valfur" but not sure cos is not clear. Also I saw one man that his son has the same leg issue and he said its surgery. please house I need advice, via IFTTT