Pain on knee and ankle of the right leg.

From last month onwards, he is complaining about this issue. We applied some pain reliefing ointments and did some massages. The pain level decreased somehow, but it won't go completely. We thought the use of boots was the issue behind this pain and he stopped to use. But still it continues. He used to go Jim previously and took a break. That time the pain starts. Is that the reason behind this problem? Or shall we consult a orthopedist? He had a surgical history of his legs(bow legs correction done on childhood) . Now there is no problem doing anything like walking, jumping, swimming and daily activities. Legs looks thin compared to the upper body but strong enough. Can u give a solution for this issue?