Is the swelling inside my knee joint?
No – and this is a useful distinction. Prepatellar bursitis is a swelling in front of the kneecap, between skin and bone, not inside the knee joint itself. A swelling inside the joint (an effusion) points to a different, joint-related problem. Because they mean different things and are treated differently, part of our assessment is confirming the swelling is the superficial bursa, not the joint.
Could it be infected?
It can be, and that is the one thing we always check. If the swelling is red, hot, very painful, growing quickly, or you have a fever or a cut over the knee, it may be septic bursitis, which needs prompt drainage and antibiotics. The common non-septic form is not infected and settles more simply. Sorting out which you have is the first and most important step.
I kneel a lot for work – what can I do?
Kneeling is the classic cause, so the most effective treatment and prevention is reducing it: kneel on thick padding, use proper knee pads, take regular breaks off the knees, and share or rotate kneeling tasks where possible. Removing or cushioning the kneeling is what settles the current swelling and stops it recurring – simple measures, honestly, are what work here.
Will it need draining?
Usually not. For the common non-septic form, we avoid routine draining because it tends to recur and can introduce infection. We aspirate only when there is a genuine reason – a large uncomfortable swelling, or to test the fluid for infection or gout. Otherwise, kneeling avoidance and time do the work with less risk.
When is surgery indicated?
Rarely. Removing the bursa (bursectomy) is reserved for chronic, non-infected bursitis that keeps recurring or stays symptomatic despite proper conservative care and kneeling avoidance. Most people never need it. Infected bursitis is treated urgently with drainage and antibiotics rather than elective surgery. We keep any operation for the genuine refractory minority.
