Tendon attachment irritation (enthesiopathies) in the hand and wrist

Anatomy: What is the tendon insertion (enthesis)?

The enthesis is the anchoring of a tendon to the bone. This zone is subject to high biomechanical stress: forces from gripping, typing or carrying are transmitted into the bones here. On the hand, entheses can be found, among other things, on the bases of the metacarpal bones (e.g. for the M. flexor carpi radialis and the M. extensor carpi ulnaris), on the phalanges (finger flexors/extensors) and on the first ray (thumb abductors and extensors).

• Tendon attachments on the wrist: flexor/extensor carpi (radialis/ulnaris)
• Tendon attachments on the thumb: Abductor pollicis longus, Extensor pollicis brevis/longus
• Tendon attachments on the fingers: Flexor digitorum superficialis/profundus, Extensor digitorum

In comparison to the tendon sheath (tendovaginitis), the pain in enthesopathy is primarily at the bony attachment - often clearly locally tender.

What is tendon attachment irritation (enthesopathy)?

Enthesopathy is an irritation or degenerative change at the tendon-bone connection. Common triggers are overload or incorrect loading, repeated microtraumas, but also systemic inflammation (e.g. seronegative spondyloarthritis, psoriatic arthritis). Acute overload can lead to painful irritation; Chronic stress promotes remodeling processes, thickening or calcification (insertion tendinopathy).

Typical symptoms

• Localized pressure pain directly at the base of the tendon
• Start-up pain with activity, morning stiffness
• Increased pain when the affected tendon is tensed isometrically
• Sometimes swelling, feeling of warmth, load-dependent reduction in strength
• Pain provocation during specific gripping, turning or abduction movements

Pain at rest and at night indicate greater inflammatory activity or accompanying factors and should be clarified by a doctor.

Causes and risk factors

• Repetitive stress: lots of typing/mouse work, crafts, musical instruments, sports (e.g. climbing, tennis, CrossFit)
• Poor technique or lack of breaks
• Previous injuries or biomechanics (e.g. instabilities, ligament lesions)
• Systemic factors: psoriatic arthritis, spondyloarthritis, diabetes mellitus
• Aging processes of the tendon, smoking, certain medications (e.g. fluoroquinolones)
• Crystal arthropathies: gout, CPPD with calcifications near the enthesis

Diagnostics in Hamburg: clinical and imaging

The diagnosis results from anamnesis, targeted examination and modern imaging. We check the location, character of pain and function of the affected tendon - including isometric tests and differentiation from tendonitis.

• Clinic: local pressure pain at the base of the tendon, pain with targeted tension
• Sonography (often first choice): thickening of the enthesis, hypoechogenicity, calcifications, erosions; Power Doppler to demonstrate hypervascularization
• X-ray: Evidence of calcifications or bony attachments
• MRI: in case of unclear findings or suspicion of partial/complete tear, accompanying pathologies
• Laboratory (targeted): inflammation values, uric acid; If a systemic disease is suspected, rheumatological evaluation may be necessary

It is important to distinguish it from other causes of wrist and thumb pain, such as tendovaginitis, ligament injuries, ganglia or osteoarthritis.

Differential diagnoses

• Tendovaginitis (e.g. De Quervain, intersection syndrome)
• SL ligament rupture or TFCC lesion for ulnar pain
• Ganglion (tendon or joint cyst)
• Rhizarthrosis (saddle joint) or radiocarpal arthritis
• Nerve constriction (e.g. carpal tunnel syndrome) with atypical pain/paresthesia
• Tendon rupture (sudden loss of function, snapping, hematoma)

Conservative therapy: step-by-step plan

The aim is pain-adapted stress control, functional training and the control of inflammatory stimuli. Most enthesiopathies of the hand and wrist can be improved without surgery.

Heat/cold are used based on symptoms: cold in the acute phase, heat for muscle tension. Dietary supplements do not replace therapy; a benefit must be assessed individually.

Injections and regenerative procedures – with a sense of proportion

If symptoms persist despite consistent conservative measures, injections can be considered. We carefully clarify the benefits and risks and, if appropriate, carry out procedures using ultrasound guidance and in a way that is gentle on the tissue.

• Cortisone (peritendinous): can relieve pain in the short term; Limit repetitions due to risk of tendon degeneration. No intratendinous injections.
• PRP (platelet-rich plasma): there is evidence from other regions for enthesiopathies; on hand, the evidence is limited. Use individually according to indication.
• Needling/tenotomy (under ultrasound): in selected chronic cases when conservative therapy has had no sufficient effect for months.
• Hyaluronic acid/other preparations: Evidence for hand enthesis is inconsistent; Use cautiously.

Injections do not replace active rehabilitation. The combination of load control, training and root cause correction remains crucial.

Surgery – rarely necessary

Surgery should only be considered if there is a clear indication, e.g. B. in the case of structural damage (partial tears with functional deficit), pronounced calcifications with mechanical conflict or lack of improvement after long, consistent conservative therapy. The procedure and risk-benefit are discussed individually. Guaranteed success cannot be guaranteed.

Course and prognosis

With early adjustment of the load and targeted therapy, symptoms often improve within weeks to a few months. Chronic enthesiopathies require patience and structured training and everyday management. Systemic inflammation can influence the course and should be treated.

• The healing process is individual and stress-dependent
• Smoking, poor sleep and inadequate regeneration delay recovery
• Avoid relapses: gradually increase stress with monitoring of the pain reaction (24-48 hour rule)

Self-help and prevention

• Microbreaks: short relaxation exercises every 30-45 minutes
• Ergonomics: neutral wrist position, adapted mouse pad/keyboard, non-slip grip pads
• Warm up before exercise, especially before sports/musical instruments
• Increase in load by a maximum of 10-15% per week
• Strengthening exercises for forearm flexors/extensors, thumb stabilizers, ulnar stability
• Compensatory training: shoulder blade and core stability for better power transfer

When should I see a doctor?

• Severe pain at rest, waking up at night
• Fever, redness, significant overheating (suspected infection)
• Sudden loss of function or clicking (suspected crack)
• Neurological symptoms: numbness, tingling, loss of strength
• Trauma with persistent pain/swelling
• Chronic symptoms lasting several weeks despite personal measures

Special features of sport and work

Athletes (climbing, tennis, CrossFit, rowing) and skilled trades are more commonly affected. Technical training, device settings and load periodization are central. In the office, ergonomic adjustments and regular breaks help.

• Sports break not absolute: pain-adapted modification and alternative training
• Taping or temporary orthoses for relief in the subacute phase
• Return to activity: gradual, with a focus on quality of movement rather than speed

Associated diseases

Enthesiopathies can be part of a rheumatological group. If there is evidence of psoriasis, back inflammation (spondyloarthritis), heel pain or a family history, we carry out a differentiated diagnosis and work in an interdisciplinary manner.

• Psoriatic arthritis, spondyloarthritis (HLA-B27 associated)
• Gout/CPPD (crystal deposition)
• Diabetes mellitus (delays healing)

Your visit to Hamburg: diagnostics and treatment plan

In our practice at Dorotheenstrasse 48, 22301 Hamburg, we first record your stress profiles and previous illnesses. A targeted examination using dynamic sonography is then carried out. Together we will determine a step-by-step therapy plan - primarily conservative, active and close to everyday life.

Example exercises (general, does not replace physiotherapy)

• Isometric wrist flexion/extension: 5x30 seconds, low pain.
• Eccentric wrist extension with dumbbell/theraband: 3×12 slow, 3–4×/week.
• Thumb stabilization (abduction/extension against ligament): low load, focus on quality.
• Nerve mobilization only if indicated; Have the implementation carried out by qualified personnel.

Exercises should be tailored to the individual. Pain >5/10 or a significant increase in irritation over 24–48 hours indicate that the load is too high.