Why has your knee been hurting for about 5 months you are now about to turn thirteen?

Knee pain for an extended period, especially around the age of thirteen, could be due to several factors such as growth spurts, overuse from sports or physical activities, or conditions like Osgood-Schlatter disease, which is common in adolescents. It's essential to consider any recent injuries or changes in activity levels that might have contributed to the pain. Consulting a healthcare professional is crucial for a proper diagnosis and treatment plan.