Bone necrosis in the knee joint is a condition where the bone tissue starts to die due to a lack of blood supply. This can lead to pain, stiffness, and difficulty moving the affected knee. It can happen to individuals of various ages. Certain factors such as trauma, excessive steroid use, or underlying health conditions may contribute to the development of bone necrosis. Prompt diagnosis and appropriate treatment are crucial to manage symptoms and preserve joint function. Treatment options may include medications, physical therapy, or in more severe cases, surgeries like cartilage transfer or joint replacement.