So, what is tenosynovitis? What are the symptoms to be alert? Tenosynovitis is a chronic aseptic inflammatory change of the tendon sheath caused by mechanical friction, and the clinical symptoms are mainly localized pain, pressure pain and limited joint mobility. To understand what is tenosynovitis, we must first understand the tendon sheath and tendon. Tendon is a dense connective tissue in the form of cords or membranes at both ends of the muscle belly, which facilitates muscle attachment and fixation. The tendon of a muscle is attached to two or more different bones, and it is due to the traction of the tendon that the contraction of the muscle drives the movement of the different bones. In fact, the back of our hand is often seen like a rubber band, of which there are 9 on the front of the palm. The thumb is connected to the wrist with 1, and the other 4 fingers have 2 each; the back of the hand also has 9, with 2 on the side of the thumb, 1 on the back, 2 on the index finger and 2 on the little finger, and 1 on the rest. What about the tendon sheath? To put it simply, it is the thing that encases the tendon. During daily activities, the tendon slides through the sheath to perform the functional movements of our hand. When our fingers repeatedly do the same action, the tendon inside the finger is like a rope, constantly rubbing in the tendon sheath repeatedly, after the tendon rubs the tendon sheath, it will proliferate and grow extra buds, the tendon sheath space is getting narrower and narrower, at this time, the tendon through the tendon sheath, it will be stuck, the finger is very stiff, if the card is very tight, bending the finger will make a sound, which is why tendinitis is also called popping This is why tenosynovitis is also known as a rattling finger. What are the usual movements or hand habits that can lead to tendonitis? When the tendons in the tendon sheath meet the characteristics of fast, strong, and long time tendinitis, so the usual repeated finger activities are prone to tendinitis, what kind of activities are considered repeated activities, and how long is the activity prone to tendinitis? The more frequent the activity is, the longer it lasts, the more unfavorable it is. Some people may have a wider tendon sheath and play with their cell phones 24 hours a day without causing tendonitis, but it is certain that over time, wear and tear will increase and the greater the likelihood of tendonitis. Who is prone to tendonitis? What parts of the hand are prone to tendinitis? The vast majority of tendonitis is seen in manual workers and housewives, but with the increase in computer, tablet, and cell phone applications, the incidence is also increasing in young people. Tendonitis is divided into two categories, one is radial stenosis tendonitis, is the thumb and wrist connection between the “rope”; two is flexor stenosis tendonitis, is the forefinger and middle finger and wrist connection of the rope. Why are these three fingers? Because they are the most active, you will often use the little finger, the answer must be very little. What should I do if I have tendonitis? Are there any exercises to relieve it? Tendovaginitis is a common clinical condition, and patients with mild symptoms in the early stages can be treated non-surgically, including reducing hand activity, especially flexion and extension of the fingers, applying physical therapy, and local closure if necessary. If the symptoms are more severe or conservative treatment is not effective, surgery is performed to restore the tendon sheath to a loose state and ensure smooth tendon movement. How to prevent tenosynovitis in general? ”If you find that you have difficulty flexing or extending your fingers or experience mild pain, you should pay attention to reducing repetitive finger movements and prolonged overexertion to facilitate recovery. As long as you don’t overuse your hands and take reasonable breaks, you won’t have any major problems. When using a cell phone, alternate your hands to prevent overexertion of one thumb, such as holding the phone in both hands for texting to balance the pressure on both hands. Do not press your thumb hard on the keyboard, do not press for too long, and usually try to avoid or reduce the use of your hands to grasp heavy objects. After the work of operating with your fingers, you can do simple workplace exercises to eliminate fatigue.