Elbow, Wrist & Hand
Flexor Tenosynovitis (Hand/Finger)
Also called: Flexor tendon sheath inflammation
Inflammation of the sheath around the finger-bending tendons — from overuse (gripping, climbing, repetitive work), inflammatory conditions, or infection. The infectious version is a true hand emergency; the mechanical version responds to load management and graded care.
Common signs
- Aching along a finger/palm flexor line with stiffness
- Swelling along the tendon; discomfort with active bending
- Morning stiffness easing with gentle motion
- History of grip-intensive loading
Seek help now if
- The infected version — a finger held slightly bent, swollen like a sausage, tender along the whole sheath, painful with passive straightening (Kanavel's signs), often after a puncture — is a same-day surgical emergency
- Fever with hand swelling
- Rapidly spreading redness
Any of these: call 911 or get to an emergency room first. Everything else can wait.
What to do first
- Rule the emergency out first: any suspicion of infection goes to urgent care/ER now — hours matter for finger function
- Mechanical cases: relative rest from the provoking grips, gentle motion within comfort
- Contrast baths and gradual reloading as irritation settles
If it's become chronic
- Recurring flexor-line irritation: audit grip loads (climbing volume, tool work), technique, and recovery — capacity building is the fix
- Inflammatory-pattern cases (multiple sites, morning-dominant, systemic) get an inflammatory workup
- Progress loading gradually back to full grip demands
Natural healing options we use
- Load management and graded grip reloading
- Manual therapy for the flexor system and palm
- Tendon-glide program
- Attended e-stim; omega-3 and anti-inflammatory nutrition
About imaging
Clinical; ultrasound can visualize sheath fluid; labs/imaging when infection or inflammatory disease is in question.
Daily self-care
- Daily tendon glides during recovery
- Grip-load diary if it recurs
- Immediate care for any puncture wound to a finger that swells
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Please read: this page is education, not a diagnosis. A proper examination is how a condition gets confirmed and a plan gets built. See our medical disclaimer.