There are several reasons why walking becomes lame after a patella fracture: first, the most common fear psychology, because after the fracture, there will be obvious pain when walking and exercising, so the majority of patients will have fear psychology, even if the fracture has completely healed, fully able to bear the weight of the limb and the pressure when walking, but there is always a psychological feeling of not daring to bear the weight, afraid of pain, so This can lead to limping when walking. Secondly, because the joint function has not fully recovered, the phenomenon of limp will also occur when walking.