tenosynovitis
Medical term for inflammation of the tendon sheath. Often associated with repetitive strain injuries.
I got tenosynovitis from overusing my wrist.
tendonitis; tendinitis
More general term for tendon inflammation, sometimes used interchangeably with 腱炎. In everyday language, 腱鞘炎 is often used loosely for tendonitis.
See also: 腱炎
Tenosynovitis is a type of tendonitis.