In our joint, some amount of fluid is present naturally which works as lubrication and reduces friction to provide smooth movement.
When excessive fluid collects around the joint it is known as joint effusion. Effusion generally appeared as the swelling in the knee. The reason can be an injury, infection, or any medical condition.
Excessive stress on the knee joint and injury to the knee joint is a risk factor for knee effusion but there are other factors also that raise the risk of having knee effusion.
The patient comes with the complaint of a sore knee.
Treatment depends on the cause of knee effusion.