Swelling after knee surgery is common, but if it persists beyond the expected recovery period or is accompanied by severe pain, redness, warmth, or fever, it may indicate an infection or a blood clot. In such cases, it's crucial to seek immediate medical attention. Dr. Hesham Al-Khateeb, a leading orthopedic surgeon in Dubai, advises monitoring swelling closely and consulting your surgeon if any unusual symptoms occur to ensure a safe and smooth recovery.