Synovitis is generally not related to age, mostly due to excessive exercise, degeneration of articular cartilage, joint strain, etc., so there is no such thing as an age group with more cases. 1. Degeneration of articular cartilage: degeneration of articular cartilage refers to the degeneration of the patient’s joints, resulting in joint hyperplasia or rapid aging of the joint bone. As a result, the synovial membrane becomes edematous and fluid accumulates. 2 acute trauma: if the amount of exercise is large, long-term strenuous exercise, easy to appear knee sprain or ligament injury, if not given timely treatment may appear synovitis. 3. Joint strain: long-term labor, such as carrying heavy objects for a long time. It is easy to cause wear and tear ligament or cruciate ligament injury, thus causing acute knee traumatic synovitis. Synovitis is a kind of multiple diseases, the incidence part is mainly in the knee joint. Synovitis does not depend on age and is usually caused by overuse, degeneration of articular cartilage, and trauma. Synovitis is usually characterized by localized congestion and edema, and can lead to fluid accumulation in the joint, so there is no specific age. If you experience any of the above discomfort symptoms, please seek prompt medical attention and active treatment so as not to miss out on your condition.