What condition describes the inflammation of a joint, often resulting in increased synovial fluid production?

The condition characterized by inflammation of a joint, leading to an increase in synovial fluid production, is known as synovitis. This inflammation typically occurs in response to injury, infection, or diseases such as arthritis, where the synovial membrane, which lines the joint capsule, becomes inflamed.

In synovitis, the inflamed membrane produces excess synovial fluid, which can cause swelling and discomfort in the affected joint. This condition can lead to symptoms such as pain, reduced joint mobility, and stiffness. Recognizing synovitis is crucial for effective diagnosis and treatment, which may include rest, anti-inflammatory medications, and physical therapy.

The other terms do not refer to this specific condition. Supination refers to a type of movement that involves turning the palm upward or the foot outward. A symptom is a general term for any indication of a disease or condition, and synarthrosis refers to a type of joint that allows little to no movement, not specifically related to inflammation. Thus, synovitis is the correct term to describe the inflammation of a joint with increased synovial fluid production.