Tendovaginitis may be caused by factors such as long-term strain, cold and traumatic stimulation. 1. Long-term strain: If you are engaged in physical activities for a long period of time, the tendon and the tendon sheath will continue to rub against each other repeatedly. Failure to rest effectively for a long period of time can lead to irritation of the tendon sheath area, which in turn causes tenosynovitis. 2. Cold: when the living environment is too cold, poor warmth measures, or repeated contact, immersion in cold water, resulting in abnormal local blood circulation, induced tendovaginitis. 3. Traumatic stimulation: when the hand is hit by heavy objects, such as car accidents, wooden stick blows and other factors, causing fractures and other traumatic situations, later can also lead to tendovaginitis. Suffering from tenosynovitis, should reduce the handling of heavy objects, pay attention to good hand protection. If the symptoms continue to be unrelieved, it is necessary to seek medical treatment in time to avoid aggravation of the condition, which will affect the health of the body.