Water on the knee, or knee effusion, refers to the buildup of fluid in and around the knee joint. This condition leads to a painful, swollen knee and can be caused by various factors, including ...

Some amount of fluid around your knee is necessary — it helps cushion your bones and keeps the joint limber. But if too much fluid accumulates, it can lead to an effusion (or an abnormal collection of ...

Of all causes, overuse is the most common reason for an infused knee. Fluid buildup is your body’s way of protecting the area from extra damage. You may have minor swelling after a vigorous activity.

Knee swelling can often be treated at home with rest, ice, and other remedies. But some symptoms may indicate a more severe injury or health condition. Swelling can be the body’s response to damage to ...

Swelling in the knee can reduce mobility and cause pain. To quickly ease the swelling, a person can try resting, applying ice, elevating the knee, anti-inflammatory medications, massages, and gentle ...

Septic arthritis of the knee involves a sudden, severe infection in one or both knee joints. Without treatment, it can impair mobility, lead to permanent damage, or even be fatal. Septic arthritis is ...