An infection in the knee joint is a serious condition where harmful bacteria or other microorganisms invade the joint, leading to inflammation and potential damage. This can result from various causes, including surgery, injury, or underlying health issues. Symptoms may include pain, swelling, redness, and difficulty moving the knee. Treatment typically involves antibiotics, and in severe cases, drainage of the infected joint fluid may be necessary. If you suspect an infection, seek immediate medical advice for an accurate diagnosis and appropriate care to safeguard the health of your knee joint.