Learn about genu valgum (knock knees), its causes, symptoms, diagnosis, and treatment options to prevent long-term joint problems. Common in children aged 3–7, it’s usually just a normal stage of growth that corrects itself by adolescence. However, persistent or worsening cases can result from factors like obesity, rickets, genetic disorders, or injury, and may cause knee pain, instability, or joint strain that increases the risk of early arthritis. Diagnosis typically involves measuring the ankle gap when the knees touch, checking walking patterns, and sometimes taking X-rays. Most children don’t need treatment, but managing weight, doing physical therapy, or using braces can help in more serious cases, while guided growth surgery may be an option for severe alignment problems. Early monitoring and timely intervention help ensure healthy movement, a stable gait, and pain-free steps into adulthood.