The second joint of my right thumb hurts

Hands are a very important organ in our body and are as important as our five senses. Although we use our hands a lot in our daily lives, we still need to protect our fingers and palms and never let our hands get hurt. Otherwise, serious consequences will affect our lives for the rest of our lives. If you find that your fingers are uncomfortable, you should go to the hospital for examination and treatment in time.

Thumb tenosynovitis is a tendon disease of the hand, which refers to tenosynovitis of the flexor pollicis longus at the first metacarpal head and tenosynovitis of the flexor tendons at the metacarpal heads of the 2nd, 3rd, 4th, and 5th fingers. The tendon of the flexor pollicis longus enters a narrow channel formed by the bone groove and the sheath ligament on the palm side of the metacarpal bone at the neck of the first metacarpal bone. At the base of the first phalanx and the sesamoid bone on its ulnar side, the superficial and deep heads of the flexor pollicis brevis are attached respectively, and the flexor pollicis longus tendon passes between the two. Long-term friction between the two tendons and the tendon sheath can cause chronic inflammation.

Causes

It can be caused by injury, overuse (especially in the thumbs, hands, elbows and fingers), osteoarthritis, some immune diseases, or even infection. Some occupations that require long-term repetitive strain on joints, such as typists, keyboard players, instrumentalists, cargo handlers, or industries that require long-term computer operation, can cause or aggravate this disease. Common affected areas include the wrists, fingers, shoulders, etc. Women and diabetics are more likely to develop this disease. Patients will feel joint pain and morning stiffness. Usually the feeling of morning stiffness is most obvious after getting up, and the symptoms will not be significantly relieved with frequent activities. The affected joints are swollen and even popping, and joint movement is impaired.

Clinical symptoms

Flexor tendon tenosynovitis often occurs in the thumb, ring finger, index finger, middle finger and elbow. The affected fingers have flexion and extension dysfunction, which is particularly obvious when waking up in the morning and can be alleviated or disappear after activity. The pain sometimes radiates to the wrist. Flexion of the metacarpophalangeal joint may cause tenderness, and sometimes a thickened tendon sheath and a pea-sized nodule can be felt. When the affected finger is bent, it suddenly stays in a semi-bent position. The finger can neither be straightened nor flexed, as if it is suddenly "stuck", causing unbearable pain. With the help of the other hand, the fingers can move again, producing an action and sound like a trigger, so it is also called "trigger finger".