Wrist Tendinitis — Repetitive Strain in the Smartphone Era
Table of Contents
In the digital age, the wrist gets no rest
Modern life — gripping and scrolling smartphones, typing on keyboards, writing on tablets — forces the wrist to flex, extend, and rotate thousands of times each day. This repetitive motion accumulates friction and microdamage in the tendon sheaths of the flexor and extensor tendons that pass through the wrist, leading to tendinitis.
Patterns of wrist tendinitis
Wrist tendinitis presents in different patterns depending on the affected area. Pain on the palm side of the wrist suggests inflammation of the flexor tendon sheath, while pain on the dorsal side points to the extensor tendon sheath.
- Wrist flexor tenosynovitis: Pain on the palm side of the wrist, worse when making a fist
- Wrist extensor tenosynovitis: Pain on the back of the wrist, worse when bending the wrist back
- Intersection syndrome: Frictional tenosynovitis at the point about 4–6 cm above the wrist where extensor tendons cross over each other
- Associated symptoms: Crepitus (creaking sound) during wrist movement, swelling over the tendon sheath
Correcting smartphone grip and typing posture
Without correcting the underlying motions before treatment, treatment effects can only be temporary.
- Smartphone: Hold with both hands and type with both thumbs; avoid prolonged one-handed use
- Keyboard: Adjust keyboard height so the wrists stay neutral (flat)
- Breaks: Active breaks every 30 minutes with gentle wrist rotations
Acupuncture treatment and self-care
Acupuncture promotes blood circulation in the tendon sheath and helps clear inflammatory substances, leading to rapid symptom relief. In the acute stage, control swelling with cold compresses; from the subacute stage onward, use warm compresses to promote circulation. Wear a wrist brace when symptoms are severe, but because long-term reliance can weaken muscles, gradually wean off as pain subsides.