Synovitis is a sterile inflammatory disease, which is difficult to cure clinically. The knee joint is the joint with the largest synovium, the largest articular surface and the most complicated structure. Because the synovium of the knee joint is extensive and located in the superficial part of the limb, there are more opportunities for injury and infection. Because the knee joint has a heavy load and much exercise, it is the most vulnerable to injury, so synovitis of the knee joint is the most common in clinic.

Synovitis is not an occupational disease stipulated by the state, nor is it caused by an accident due to work, so it cannot be recognized as a work-related injury.

Regulations on industrial injury insurance

Fourteenth employees in any of the following circumstances, should be identified as work-related injuries:

(1) Being injured by an accident during working hours and in the workplace;

(two) before and after working hours, in the workplace, engaged in preparatory or finishing work related to the work and was injured by an accident;

(three) during working hours and workplaces, due to the performance of duties by violence and other accidental injuries;

(4) Suffering from occupational diseases;

(five) during the business trip, injured or missing due to work reasons;

(six) on the way to work, I was injured by a traffic accident or an urban rail transit, passenger ferry or train accident for which I was not primarily responsible;

(seven) other circumstances that should be recognized as work-related injuries as stipulated by laws and administrative regulations.