Jun 16, 2022 · A swollen knee occurs when excess fluid collects in or around your knee joint. Healthcare professionals might refer to this condition as an effusion (uh-FU-zhun) in your knee …

Nov 10, 2025 · A swollen knee (knee effusion) is a common problem. Common causes include an injury, arthritis, infection, and more. Learn when it’s serious and how to treat it.

Jun 1, 2023 · Your knee is the joint that connects your thigh bone (femur) to your shin bone (tibia) and kneecap (patella). It’s the biggest joint in your body. Your knees also contain cartilage, …

Jul 12, 2025 · Because your knee has many working parts and carries a heavy load, it’s prone to problems. If you have any of these issues with your kneecap, see your doctor so you can …

Fluid may pool in the lower thigh, just above the kneecap or at the front of the knee, right on top of the knee cap. There are lots of possible causes of swelling above the knee such as soft tissue …

Prepatellar bursitis is an inflammation of the bursa in the patella (front of the kneecap). It occurs when the bursa becomes irritated and produces too much fluid, which causes it to swell and …

Aug 21, 2025 · Doctors often call a swollen knee a knee effusion. Extra fluid collects either inside the joint capsule or in nearby bursae. That fluid can be: Swelling itself isn’t the diagnosis. It’s …

Jul 1, 2020 · Some possible causes of acute knee swelling include: Bursitis occurs when the fluid-filled sacs in the knee, called the bursae, become irritated. An inflammatory response in the …

Jun 9, 2025 · Understanding the underlying causes of knee cap swelling is essential to develop effective treatment and management strategies. In this article, we will discuss the common …