It is important to have this evaluated by a healthcare professional, preferably your orthopedic surgeon, as soon as possible. While a late-onset infection six years after surgery is rare, it requires a proper physical exam and potentially imaging to identify the cause. Please avoid taking any leftover antibiotics, as this can complicate an accurate diagnosis. For temporary relief from pain and swelling, you can rest, elevate your leg, and use over-the-counter pain relievers like ibuprofen or acetaminophen if safe for you. A doctor will determine if prescription antibiotics or other treatments are necessary. Please schedule an evaluation promptly to get this safely resolved.