What causes fluid accumulation in the tendon sheath?

Jun 25, 2024 Source: Cainiu Health
Disease description:

Recently, there has been swelling on my hand, with pain upon pressing, although not severe. The doctor mentioned it is still tenosynovial effusion. I would like to ask what causes tenosynovial effusion?

Doctor's answer (1)
Dr. Xu Shuai
The formation of tenosynovial effusion is closely related to various factors such as trauma, chronic strain, infection, and other diseases. 1. Trauma: Injuries such as sprains and falls may damage the tendon sheath, leading to inflammatory reactions and fluid accumulation. 2. Chronic strain: Prolonged repetition of the same motion or excessive joint use, such as extended computer use or manual labor, may damage the tendon sheath and result in fluid accumulation. 3. Infection: Microbial infections, such as those caused by bacteria or viruses, may lead to tendon sheath inflammation and increased synovial fluid secretion, resulting in fluid accumulation. 4. Other diseases: Conditions such as rheumatoid arthritis and gout may cause fluid imbalance within the tendon sheath, leading to fluid accumulation.