If you have significant pain and obstruction of thumb movement around the radial styloid process, with localized pressure pain. Or if you have pain in the interphalangeal joints and corresponding finger immobility or popping, consider if you have tenosynovitis. A simple self-examination is to hold the thumb firmly within the other four fingers and flex the wrist to the inside of the wrist, then there will be severe pain at the radial styloid process. It is also common to see tendinitis of the flexor tendon. This disease occurs on the palmar surface of the thumb and middle finger, and is particularly pronounced in the early morning when waking up. The affected finger shows dysfunction in flexion and extension, pain sometimes radiates to the wrist, and there is pressure pain at the flexion of the finger joint, and thickened tendon sheaths and pea-sized nodules can be palpated. When bending the affected finger, it suddenly stays in the semi-bending position, the finger can neither straighten nor bend, as if it is suddenly “stuck”, but after using the other hand to assist in triggering, the finger can move again, producing a bolt-like action and popping sound, so it is also called “trigger finger ” or “popping finger. Similar problems can also occur in the soles of the feet. Women who stand and walk for long periods of time in high heels are most likely to develop plantar flexor tenosynovitis. These tendon sheaths typically present with pain or weakness, localized swelling, and some dysfunction. Tenosynovitis can occur in the fingers, toes, wrists, and ankles, but is most common in the radial styloid process and the head of the first metacarpal. The tendon sheath is thickened by fibrous degeneration due to strain injury, causing narrowing of the sheath and restricting the movement of the tendon within the sheath, so it is called tenosynovitis. Treatment: The lighter ones can be relieved by hot compresses and rest, and some of them can be treated with local closure, or tui na or acupuncture. However, most patients do not get relief after the above treatments. So tendon sheathotomy is chosen, and no manual labor for 1 month after the operation. Personally, I think that small needle knife is the treatment of choice for this disease. Small needle knife closed release incision of the narrow part of the tendon sheath, about 90% of patients can be cured by 1 time needle knife, and normal labor can be performed after 3-7 days of rest.