What should you know about knee swelling after dislocation?

A dislocation stretches several structures at once. Even after the joint is put back in place, swelling can obscure examination findings and restrict movement. An ACL tear or meniscus tear may be part of the injury pattern, while bursitis, gout, osteoarthritis, or a Baker's cyst are other possible explanations for knee swelling in different circumstances.

Clinicians may check pulses, skin colour and temperature, sensation, strength, stability, and the ability to move the foot. Follow-up is important even when the knee looks more aligned, because circulation and nerve symptoms can change.

Keep the knee in the position and brace prescribed after reduction. Do not walk, straighten, or test stability unless your treating team has said it is safe. Elevate the leg as instructed, protect the skin, and use cold therapy only in the recommended way.

Attend every arranged review and follow weight-bearing restrictions. If swelling remains tense or limits examination, a clinician may consider imaging or joint aspiration after assessing the injury and bleeding risk. Never attempt to reduce the joint yourself.

Return for urgent assessment if pain or swelling increases, the knee changes position, or the foot becomes cold, pale, blue, numb, weak, or difficult to move. Fever, wound drainage, or severe calf symptoms also need prompt review. New chest pain, breathlessness, or fainting requires emergency help.

Ask which ligaments and vessels were checked, what weight-bearing and brace rules apply, when repeat imaging is needed, and which changes in foot colour, temperature, sensation, or strength require immediate action.