There are many bags on the joint of the back of hand, which are swollen. What happened?

Consider whether it is tenosynovitis. With the popularity of computers, more and more people use computers to work. However, working in the same working posture for a long time will cause tenosynovitis and bring pain and trouble to people's work and life. Tendon refers to the part connecting muscle with bone or other muscles, and tendon sheath refers to the sheath-like structure around tendon, which fixes tendon on periosteum to prevent tendon from bouncing or slipping. Excessive rubbing of tendon here for a long time can cause traumatic inflammation of tendon and tendon sheath, leading to swelling. This condition is called tenosynovitis. If left untreated, it may develop into permanent mobility problems. Tenosynovitis can be caused by injury, excessive strain (especially on hands and fingers), osteoarthritis, some immune diseases and even infection. Some occupations that need long-term repeated joint strain, such as typists, cargo handling or industries that need long-term computer operation, will cause or aggravate this disease. The common involved parts are wrists, fingers and shoulders. Women and diabetics are more likely to get this disease. Patients will feel joint pain and morning stiffness. Usually, the feeling of joint stiffness in the morning is the most obvious after getting up, but the symptoms of frequent activities will not be significantly alleviated. The affected joints swell, even snap, and joint activity is impaired. The purpose of tenosynovitis treatment is to relieve pain and inflammation and restore limb function, including rest, braking and hot compress on the affected area. Drug treatment: oral non-steroidal anti-inflammatory painkillers and topical anti-inflammatory analgesic ointment. Physical therapy (such as laser or ultrasound and stretching). In addition, for some patients, local injection of steroids may also have a good therapeutic effect. If the above methods fail, surgical resection of the narrow tendon sheath can be considered. Pay attention to the correct posture at work, avoid excessive joint strain, and take regular rest. There are 28 bones in each hand, 24 long tendons from the forearm, and 18 small muscles in the hand, which are connected into a whole by ligaments, joints and skin. Some tendons in the hand are covered with a layer of fibrous tissue called tendon sheath. It has the function of maintaining normal finger flexion and extension and tendon sliding. When the hand is fixed in a certain position and repeatedly moves excessively, friction often occurs between tendon and tendon sheath, resulting in edema and fibrosis, causing lumen stenosis. Because the tendon moves in the tendon sheath, its path is narrow, which leads to pain and dyskinesia. This is tenosynovitis, also known as stenosing tenosynovitis. Tenosynovitis is a common disease. The common tendon sheath of extensor pollicis longus and extensor pollicis brevis and the tendon sheath of flexor pollicis longus of the first metacarpal are most common among female workers, packers and bookbinding workers in cigarette factories. Sewing workers, calligraphers, housewives, painters, etc. There are two common tenosynovitis. (1) The onset of stenosing tenosynovitis of styloid process of radius is slow, and it is getting worse gradually. It is characterized by pain of the bony process (styloid process of radius) on one side of wrist and around thumb, obstruction of thumb movement, tenderness and friction of styloid process of radius, and sometimes there are slight pea-sized nodules on styloid process of radius. If you hold your thumb tightly with the other four fingers and bend your wrist to the inside of your wrist (ulnar side), severe pain will occur at the styloid process of the radius. There may be swelling locally in the acute stage. When the swollen tendon passes through the narrow tendon sheath, the thumb will make a noise when it flexes, which is also called "snapping fingers". (2) Tenosynovitis of flexor tendon mostly occurs in thumb and middle finger. Finger flexion and extension dysfunction is particularly obvious when you wake up in the morning, and it can be alleviated or disappeared after the activity. Pain sometimes radiates to the wrist. The flexion of metacarpophalangeal joints may be tender, and sometimes thickened tendon sheaths and pea-sized nodules may be touched. When bending the affected finger, it suddenly stays in the semi-bending position, and the finger can neither be straightened nor bent, which is as unbearable as being suddenly "stuck". After being pulled with the other hand, the finger can move again, producing action and snapping sound similar to the trigger of a gun, so it is also called "trigger finger" or "snapping finger". The treatment of tenosynovitis includes: reducing finger movement early to make the local rest; Massage and acupuncture have certain curative effects; Injecting hydrocortisone acetate, triamcinolone acetonide acetate or prednisolone acetate (0.25 ml) into the tendon sheath for local blocking has a good effect. For the authors with a long course of disease and recurrent diseases, the narrow tendon sheath can be cut in parallel and partially removed, so that the tendon sheath will no longer squeeze the tendon, which can achieve the goal of radical cure.