TendinitisMANAGEMENT

MUSCULOSKELETAL AND RHEUMATOLOGIC PRESENTATIONS · 12 SECTIONS

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454 items

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01Approach to the Critical Patient/attcp35

Triage and immediate threats

›Immediate threat screen

›Suspected tendon rupture

›Sudden pop with loss of function

›Visible or palpable tendon gap

›Inability to bear weight or move against gravity

›Suspected infection

›Fever or systemic symptoms

›Rapidly progressive erythema or swelling

›Severe pain out of proportion

›Limb ischemia or compartment syndrome

›Disproportionate pain

›Paresthesia or weakness

›Diminished pulses or delayed capillary refill

›High-risk medication related tendon injury

›Current or recent fluoroquinolone exposure

›Systemic corticosteroid exposure

›Organ transplant history

Focused stabilization

›Immediate actions

›If suspected rupture, immobilize in position of function

›Achilles suspicion, plantarflexion splinting

›Extensor mechanism suspicion, knee immobilizer in extension

›If suspected infection, escalation for sepsis pathway

›Early IV access and cultures per local protocol

›Early antibiotics after cultures when clinically indicated

›If neurovascular compromise, urgent orthopedic or vascular consultation

›Splinting with frequent neurovascular reassessment

Key concepts

›Core concepts

›Tendinitis is often degenerative tendinopathy rather than primary inflammation

›Pain driven by failed tendon load adaptation and disorganized collagen

›Load management and progressive strengthening as mainstay

›Rule out rupture and infection early

›Function loss favors rupture

›Systemic symptoms and rapidly progressive local findings favor infection

›Imaging rarely needed for uncomplicated cases

›Clinical diagnosis for most overuse tendinopathies

02History/hx51

Symptom characterization

›Pain pattern

›Location at tendon or enthesis

›Mid-substance tendon pain

›Insertional pain at bone interface

›Timing

›Morning stiffness improving with gentle activity

›Pain with first steps or first lifts

›Pain flare after activity or next day

›Load relation

›Worsened by specific activity or grip

›Improved with rest or unloading

›Mechanical event

›Sudden pop or snap

›Immediate weakness or loss of function

Exposure and risk factors

›Overuse and biomechanics

›Recent training volume change

›Increased frequency

›Increased intensity

›New equipment or footwear

›Occupational repetition

›Repetitive wrist or forearm motion

›Overhead work

›Technique changes

›New sport or new form

›Poor warm-up pattern

›Medical and medication risks

›Diabetes mellitus

›Chronic kidney disease

›Inflammatory arthritis history

›Hyperlipidemia

›Thyroid disease

›Current or recent fluoroquinolone use

›Systemic or injected corticosteroid exposure

›Red flags for alternate diagnoses

›Fever

›Night pain unrelated to load

›Rapidly progressive swelling

›Neurologic symptoms

›Numbness

›Radiating pain

›Weakness beyond pain inhibition

Functional impact

›Functional limitations

›Inability to bear weight

›Inability to lift or grip

›Inability to raise arm overhead

›Inability to climb stairs or jump

›Prior episodes and treatments

›Previous tendinopathy at same site

›Prior physical therapy response

›Prior injections and timing

›Prior surgery at affected region

03Physical Exam/exam54

General and regional exam

›Inspection and palpation

›Focal tenderness along tendon course

›Mid-substance tenderness

›Insertional tenderness

›Swelling or thickening

›Fusiform tendon thickening

›Localized nodularity

›Skin changes

›Erythema or warmth

›Open wounds

›Cellulitic spread pattern

›Range of motion and strength

›Active range of motion limits

›Pain-limited motion

›Mechanical block concern

›Resisted testing

›Pain reproduction with resisted contraction

›True weakness suggesting rupture or neurologic etiology

›Adjacent joint exam

›Effusion

›Instability

›Crepitus with motion

Special tests by region

›Rupture focused tests

›Achilles

›Thompson test

›Resting ankle angle asymmetry

›Single-leg heel raise inability

›Patellar or quadriceps tendon

›Straight leg raise inability

›Extensor lag

›Patella alta concern

›Rotator cuff

›Drop arm or lag signs

›External rotation strength asymmetry

›Common tendinopathy patterns

›Lateral epicondylalgia

›Pain with resisted wrist extension

›Pain with middle finger extension

›Medial epicondylalgia

›Pain with resisted wrist flexion and pronation

›De Quervain tenosynovitis

›Finkelstein or Eichhoff pain pattern

›Plantar fascia versus Achilles insertional pain distinction

›Medial calcaneal tubercle tenderness

›Achilles insertion tenderness

PITFALLS

›Common pitfalls

›Missing rupture due to pain-limited exam

›Early swelling masking tendon gap

›Preserved plantarflexion from other muscles in Achilles rupture

›Treating infection as tendinitis

›Warmth and erythema disproportionate to overuse pattern

›Attributing radicular pain to local tendon pathology

›Dermatomal sensory changes

›Reflex changes

04Differential Diagnosis/ddx37

Life-threatening and limb-threatening

›High-risk mimics

›Tendon rupture

›Achilles rupture

›Patellar tendon rupture

›Quadriceps tendon rupture

›Rotator cuff tear with functional loss

›Septic arthritis of adjacent joint

›ICD-10 M00.9

›SNOMED CT septic arthritis

›Necrotizing soft tissue infection

›Disproportionate pain

›Systemic toxicity

›Compartment syndrome

›Exercise related or traumatic trigger

Common musculoskeletal mimics

›Nearby structure pathology

›Bursitis

›Prepatellar bursitis

›Olecranon bursitis

›Subacromial bursitis

›Sprain or ligament injury

›Muscle strain

›Stress fracture

›Osteoarthritis flare

›Inflammatory and crystal disease

›Gout flare

›ICD-10 M10.9

›Calcium pyrophosphate deposition disease

›Pseudogout

›Rheumatoid arthritis flare

›Spondyloarthropathy enthesitis

Neurologic and vascular mimics

›Neurogenic pain

›Cervical radiculopathy

›Lumbar radiculopathy

›Peripheral neuropathy entrapment

›Vascular conditions

›Deep vein thrombosis for calf swelling

›Acute limb ischemia for pain with pallor and pulselessness

05Laboratory Tests/lt20

When labs are not needed

›Uncomplicated tendinopathy

›No routine labs for classic overuse pattern

›Normal vitals and no systemic symptoms

Infection and inflammatory evaluation

›Infection concern labs

›CBC for leukocytosis

›Limited sensitivity for localized infection

›CRP for inflammatory activity

›Rising trend supports infection when correlated clinically

›ESR for inflammatory activity

›Slower kinetics than CRP

›Crystal or inflammatory arthritis concern

›Serum urate

›Normal urate does not exclude gout in acute flare

›Rheumatologic testing by outpatient pathway when indicated

›Rheumatoid factor

›Anti-CCP

Procedural labs

›Pre-procedure considerations

›If aspiration or surgery anticipated, coagulation status review per local policy

›Anticoagulant history

›Platelet count when clinically indicated

06Diagnostic Tests/dt57

Scoring Systems

›Patient-reported outcome tools

›VISA-A for Achilles tendinopathy severity tracking

›Baseline score for monitoring response

›Clinically meaningful change interpretation per instrument standards

›VISA-P for patellar tendinopathy severity tracking

›Baseline score for monitoring response

›Sport participation impact capture

›PRTEE for lateral epicondylalgia

›Pain and function domains

›Use for follow-up comparisons

›DASH for upper extremity disability

›Broad functional disability measure

›Useful when multiple structures involved

MRI

›MRI indications

›Suspected rupture with equivocal exam

›Surgical planning support

›Partial tear characterization

›Persistent symptoms despite structured rehab

›6 to 12 weeks of progressive loading without improvement

›Alternate diagnosis exclusion

›Suspected intra-articular pathology adjacent to tendon

›Labral tear concern

›Meniscal pathology concern

›MRI findings

›Tendinosis signal change

›Increased intratendinous signal

›Tendon thickening

›Partial tear features

›Focal fiber disruption

›Peritendinous edema

›Full thickness rupture

›Tendon discontinuity

›Retraction measurement

›CT indications

›Suspected fracture or avulsion not seen on plain radiographs

›Complex bony anatomy regions

›Preoperative planning

›Suspected calcific tendinopathy complications when radiographs unclear

›Large calcific deposits characterization

›Adjacent osseous involvement

›CT limitations

›Limited soft tissue tendon detail compared with MRI or ultrasound

›Radiation exposure consideration

Ultrasound

›Point-of-care and diagnostic ultrasound roles

›Tendon continuity assessment

›Full thickness tear detection

›Dynamic comparison with contralateral side

›Tendinopathy features

›Tendon thickening

›Hypoechoic degeneration

›Neovascularity on Doppler

›Tenosynovitis features

›Peritendinous fluid

›Synovial sheath thickening

›Procedure guidance

›Aspiration of adjacent bursa when indicated

›Injection guidance when selected by specialist pathway

07Disposition/dispo21

ED disposition pathways

›Discharge criteria

›Stable vitals

›No rupture concern after exam

›No infection concern after exam

›Pain controlled with oral regimen

›Ambulation or functional use acceptable with support

›Admission or urgent specialty evaluation

›Suspected tendon rupture with functional loss

›Orthopedics or sports medicine urgent pathway

›Immobilization maintained until evaluation

›Suspected septic joint or deep infection

›IV antibiotics and operative evaluation pathway

›Neurovascular compromise

›Emergent consultation

›Intractable pain with inability to mobilize safely

›Consider short-stay observation

Follow-up and reassessment timing

›Follow-up targets

›Primary care or sports medicine within 1 to 2 weeks for uncomplicated cases

›Physical therapy initiation within 1 to 2 weeks when feasible

›Orthopedics within 24 to 72 hours for suspected rupture

›Reassessment within 48 to 72 hours for evolving swelling or erythema

08Treatment/t81

Non-pharmacologic first-line

›Load management and rehab plan

›Relative rest from provoking activity

›Avoid complete immobilization unless rupture suspected

›Cross-training with pain-limited alternatives

›Progressive tendon loading

›Eccentric strengthening for mid-portion tendinopathy

›Heavy slow resistance option for chronic tendinopathy

›Frequency and progression guided by pain response

›Activity modification and biomechanics

›Technique correction

›Footwear or equipment changes

›Ergonomic adjustments for work

›Adjuncts

›Ice for short-term analgesia

›Heat for stiffness pattern if preferred

›Compression and elevation for reactive swelling

›Bracing and supports

›Counterforce brace for lateral epicondylalgia

›Wrist or thumb spica splint for De Quervain

›Heel lift or temporary offloading for Achilles insertion pain

›Patellar strap for patellar tendinopathy symptom relief

Analgesia and anti-inflammatory medications

›Topical NSAIDs

›Diclofenac gel per local formulary dosing

›Lower systemic exposure than oral NSAIDs

›Preferred when localized superficial tendinopathy

›Oral analgesics

›Acetaminophen per weight and hepatic risk

›Suitable when NSAIDs contraindicated

›Oral NSAIDs short course when appropriate

›Lowest effective dose

›Avoid in high GI bleed risk without protection plan

›Avoid in advanced CKD

›Opioids

›Generally avoid for tendinopathy

›Reserve for short-term severe pain with clear functional impairment

›Small quantity with follow-up plan

Injections and procedures

›Corticosteroid injections

›Avoid in Achilles and other high rupture risk tendons

›Increased rupture risk concern from observational data

›Consider specialist-only pathway when contemplated

›Lateral epicondylalgia

›Short-term pain relief possible

›Worse intermediate and long-term outcomes compared with rehab in multiple trials

›Other injectables

›PRP

›Mixed evidence by tendon and chronicity

›Consider after failed structured rehab in specialist pathway

›High volume or sclerosing approaches

›Specialist selection only

›Variable evidence base

›Aspiration

›Adjacent bursitis with significant fluctuant swelling

›Culture and cell count when infection concern

›Compression dressing after aspiration when appropriate

Regional specific protocols

›Achilles tendinopathy

›Rehab emphasis

›Eccentric or heavy slow resistance program

›Avoid stretching in highly reactive acute phase if worsens pain

›Imaging selection

›Ultrasound for tear concern

›MRI for refractory course or surgical planning

›Rotator cuff tendinopathy

›Early motion and scapular stabilization

›Avoid prolonged sling use unless severe pain

›Targeted rotator cuff and periscapular strengthening

›Subacromial pain syndrome considerations

›Night pain and overhead provocation pattern

›Consider ultrasound for tear suspicion

›Lateral epicondylalgia

›Counterforce brace and rehab

›Eccentric wrist extensor strengthening

›Activity modification for gripping

›Injection caution

›Avoid repeated steroid injections due tendon degeneration risk

Evidence levels and guideline framing

›Evidence framing

›Progressive loading rehab supported by multiple randomized trials and clinical practice guidelines for common tendinopathies

›Consider as Class I recommendation based on consistency of benefit and low harm

›Imaging reserved for atypical features or failure of structured rehab

›Consider as Class I recommendation for resource stewardship and low yield in classic cases

›Corticosteroid injection caution for lateral epicondylalgia long-term outcomes

›Consider as Class IIb recommendation for selective short-term relief with informed consent

09Special Populations/sp30

Pregnancy

›Pregnancy considerations

›Medication safety

›Avoid NSAIDs in third trimester due fetal risks

›Acetaminophen as first-line analgesic when appropriate

›Mechanical contributors

›Weight gain and altered biomechanics increasing tendon load

›Postpartum overuse related to infant care and lifting

›Imaging

›Ultrasound preferred when needed

›MRI without gadolinium when needed for major concern

Geriatric

›Older adult considerations

›Degenerative tendon changes increasing tear risk

›Lower threshold for rupture evaluation with sudden weakness

›Medication risks

›Fluoroquinolone associated tendinopathy and rupture risk higher with age

›Concomitant systemic steroids increasing rupture risk

›Comorbidities affecting healing

›Diabetes and vascular disease

›CKD limiting NSAID use

›Falls and occult fracture consideration

›Low threshold for radiographs with trauma history

Pediatrics

›Pediatric considerations

›Apophysitis mimics

›Osgood Schlatter disease for anterior knee pain

›Sever disease for heel pain

›Growth plate and avulsion risk

›Sudden pain during sprint or jump raises avulsion concern

›Rehab emphasis

›Technique coaching and gradual return to sport

›Avoid over-specialization and excessive training load

10Background/b31

Epidemiology

›Epidemiology overview

›Common overuse syndromes in active adults and repetitive occupations

›Achilles, patellar, rotator cuff, epicondylar tendinopathy common sites

›Risk increases with sudden load spikes

›Training errors as frequent precipitant

›Medication associated risk recognized

›Fluoroquinolone exposure linked to tendinopathy and rupture

Pathophysiology

›Pathophysiology summary

›Tendinopathy features

›Collagen disorganization

›Increased ground substance and tendon thickening

›Neovascularity and nociceptive ingrowth

›Insertional versus mid-portion differences

›Insertional enthesopathy with compressive and tensile load interplay

›Mid-portion tends to respond well to eccentric loading

›Reactive tendinopathy model

›Early reactive phase potentially reversible with load reduction

›Dysrepair and degenerative phases requiring longer rehab

Therapeutic Considerations

›Treatment principles

›Load modification as primary lever

›Reduce peak tendon strain

›Preserve overall activity and conditioning

›Progressive strengthening as disease-modifying approach

›Tendon adaptation requires time and consistent loading

›Symptom improvement may lag behind strength gains

›Anti-inflammatory therapy role limited

›Pain modulation rather than structural repair

›Topical NSAIDs favored for localized pain with lower systemic risk

›Injection therapy selection caution

›Short-term analgesia may delay rehab engagement

›Tendon weakening concerns with corticosteroids at certain sites

11Patient Discharge Instructions/pdi23

copy discharge instructions

›Discharge counseling

›Diagnosis explanation

›Tendon overuse injury with load sensitivity

›Recovery depends on gradual strengthening and avoiding sudden overload

›Home care plan

›Relative rest from provoking activity for 1 to 2 weeks

›Ice 10 to 15 minutes as needed for pain

›Compression and elevation for swelling if present

›Start gentle range of motion if not immobilized

›Begin progressive strengthening plan or physical therapy referral

›Medications

›Topical NSAID as directed if appropriate

›Acetaminophen as directed if needed

›Oral NSAID short course only if safe for kidneys and stomach

›Return precautions

›Sudden pop with new weakness

›Inability to bear weight or use limb

›Rapidly increasing swelling, redness, or warmth

›Fever or chills

›New numbness or color change in limb

›Follow-up

›Primary care or sports medicine within 1 to 2 weeks

›Earlier follow-up for worsening symptoms or concern for rupture

12References/r14

Clinical guidelines and key sources

›Guideline and evidence sources

›Clinical practice guidelines from sports medicine and physical therapy societies for tendinopathy rehabilitation

›Emphasis on progressive loading and patient education

›Limited role for routine imaging in classic presentations

›Randomized trial evidence for eccentric loading programs in Achilles and patellar tendinopathy

›Consistent functional improvement across multiple studies

›Longer time course expected for durable benefit

›Evidence summaries on corticosteroid injections for lateral epicondylalgia

›Short-term pain relief with poorer longer-term outcomes compared with rehab

›Safety communications and observational evidence on fluoroquinolone associated tendinopathy and rupture risk

›Higher risk with older age and concomitant systemic steroids

›Imaging appropriateness guidance for suspected tendon rupture and refractory tendinopathy

›Ultrasound and MRI for tear characterization when exam equivocal

›Plain radiographs for trauma, avulsion, or calcific disease suspicion

Evidence & Review

Reviewed by SymptomDx Medical Team · Last reviewed June 16, 2026

SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.