A patellar fracture is a break in the patella, or kneecap, which can occur due to direct trauma, falls, or excessive stress on the knee. Symptoms include severe pain, swelling, difficulty straightening the knee, and a visible deformity in the knee area. Treatment may involve immobilization with a brace or cast, surgery for more complex fractures, and physical therapy to restore strength and function. Seeking prompt medical attention is important to prevent potential long-term complications and to ensure proper healing.