The knee is a highly complex joint that endures significant stress, making it susceptible to various injuries and degenerative conditions. These issues are especially common among athletes, active individuals, and older adults. Knee problems often include ligament tears, meniscus injuries, cartilage damage, and overuse conditions. Treatment varies widely, depending on the injury’s severity and the patient’s specific needs, ranging from conservative approaches like rest and physical therapy to more aggressive treatments such as surgery. Early diagnosis and tailored treatment are key to avoiding long-term issues like chronic pain or arthritis. Ligament injuries, particularly tears of the anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL), frequently occur during sports or high-impact activities. Diagnosis generally involves a combination of physical examination and imaging, such as magnetic resonance imaging (MRI). Treatment options can include both conservative methods, like bracing and rehabilitation, and surgical procedures in cases of complete tears or instability. Meniscus tears are another common source of knee pain. These injuries, whether caused by acute trauma or gradual degeneration, affect the menisci, which are crucial for joint stability and shock absorption. While some tears can be managed with physical therapy and anti-inflammatory medication, others may require surgical repair, especially if the tear is severe or impacts daily activities. Cartilage defects, particularly in athletes, are also a significant concern. Damage to the articular cartilage can arise from abnormal joint loading and, if untreated, may lead to early-onset osteoarthritis. MRI is often used to diagnose these injuries, with treatments ranging from noninvasive methods to surgical repair, depending on the extent of the damage. In children and adolescents, overuse injuries such as Osgood–Schlatter disease (OSD) and tibial stress syndrome are often seen, especially during growth spurts. Treatment typically involves rest and physical therapy, though more serious cases may require surgical intervention. Effective treatment of knee injuries requires a comprehensive approach. Proper diagnosis, imaging, and an individualized treatment plan tailored to the patient’s activity level and injury severity are essential to ensuring the best possible outcomes and maintaining long-term knee health.