Medial Epicondylalgia

History: gradual onset of pain over the medial elbow, often radiating into the forearm flexor mass. Worse with gripping, wrist flexion, and forearm pronation - carrying, turning screwdrivers, shaking hands, golf swing (trail arm), tennis forehand and serve. May report grip weakness. In throwing athletes, medial elbow pain typically occurs during the late cocking and acceleration phases (valgus overload). Always ask about tingling or numbness in the ring and little fingers (ulnar nerve involvement).

Examination:

• •Tenderness over the medial epicondyle and immediately distal at the flexor-pronator origin
• •Resisted wrist flexion test (elbow extended, forearm supinated): pain at the medial epicondyle - the most commonly used provocative test

• •Resisted forearm pronation: isolates pronator teres
• •Passive wrist extension with elbow extended: stretches the common flexor origin
• •Grip strength reduced on the affected side
• •ROM usually preserved; significant fixed loss should prompt consideration of other pathology
• •Mandatory ulnar nerve assessment: Tinel test at the cubital tunnel, sensation in the ulnar 1.5 digits, intrinsic hand muscle power, Froment sign
• •Valgus stress test at 30 degrees of elbow flexion: pain or laxity suggests MCL insufficiency
• •Always examine the cervical spine (C8/T1 radiculopathy can refer to the medial elbow)

Differentials: cubital tunnel syndrome (numbness in ring/little fingers, intrinsic wasting, positive Tinel - commonly coexists); MCL insufficiency (valgus instability, throwing-related pain, positive valgus stress test at 30 degrees); valgus extension overload (posterior medial impingement in throwing athletes, pain during deceleration / follow-through); medial elbow OA; C8/T1 cervical radiculopathy; lateral epicondylalgia (opposite pattern); pronator syndrome (median nerve entrapment at the elbow - aching medial forearm pain PLUS numbness across the FULL median territory including the thenar eminence, because the palmar cutaneous branch is compressed proximal to the carpal tunnel - thenar sensation is the critical distinguisher from carpal tunnel syndrome where it is spared).

Clinical diagnosis. Imaging is reserved for diagnostic uncertainty.

• •Plain radiographs: not required for typical presentations. Indicated if trauma, significant loss of ROM, or suspected loose body or OA. In throwing athletes may show medial traction spurs or olecranon osteophytes
• •Ultrasound or MRI: only when the diagnosis is uncertain, a tendon tear is suspected, MCL assessment is required, or symptoms are refractory. MRI is superior for MCL assessment
• •Nerve conduction studies: if ulnar neuropathy is suspected and symptoms are persistent, progressive, or functionally significant
• •Bloods: not routinely indicated. Consider inflammatory markers if inflammatory arthritis is suspected
• •Outcome measures: DASH and grip strength dynamometry

Usually self-limiting. The high-quality trial evidence base is thinner than for lateral epicondylalgia. Management principles are extrapolated from lateral elbow tendinopathy guidance (NICE CKS, BESS 2023).

First-line (community):

• •Education: explain the self-limiting nature, expected recovery (6-24 months), and the central role of active management
• •Activity modification: reduce aggravating activities, modify technique and equipment. Avoid complete rest
• •Analgesia: topical NSAID for short-term relief; oral NSAID short-term if needed
• •Physiotherapy: supervised exercise-based rehabilitation is the mainstay. Progressive loading of the flexor-pronator group following tendinopathy principles
• •Orthoses: a wrist splint or counterforce brace may be tried but benefit is uncertain

Corticosteroid injection - not favoured:

• •Routine injection is not favoured. The anti-injection stance is extrapolated from lateral elbow evidence (Coombes 2013, Bisset 2006) - short-term relief but worse long-term outcomes
• •The ulnar nerve proximity creates a specific additional risk of inadvertent nerve injury
• •If considered in an exceptional case, performed by an experienced practitioner with clear counselling

Not supported: ESWT (extrapolated from BESS 2023 lateral guidance); PRP (no clear benefit over placebo); autologous blood injection; dry needling.

Ulnar nerve management: mild irritation often improves with epicondylalgia management and activity modification (avoid sustained elbow flexion, avoid leaning on the elbow). Persistent, progressive, or functionally significant motor symptoms warrant nerve conduction studies and specialist referral.

Referral: refer if symptoms persist beyond 6-12 months despite optimised conservative management; earlier if progressive ulnar nerve symptoms, suspected MCL injury in a throwing athlete, diagnostic uncertainty, or significant occupational impact.

Surgical options (awareness): rarely required. Minimum 12 months conservative management before surgery is considered. Debridement of the degenerative flexor-pronator origin plus or minus ulnar nerve decompression or transposition. MCL reconstruction (Tommy John surgery) in competitive throwing athletes with confirmed ligament insufficiency. Evidence versus placebo is poor and patients must be counselled accordingly.

Phase 1 (pain-dominant / reactive): isometric wrist flexion and pronation exercises within symptom tolerance. Activity modification. Orthosis may be tried.

Phase 2 (loading / dysrepair-degenerative): progressive isotonic wrist flexion and forearm pronation. Eccentric loading and heavy slow resistance with gradual increases in resistance.

Phase 3 (functional): graduated return to aggravating activities. Sport-specific drills (golf swing, tennis forehand, throwing mechanics). Kinetic chain assessment addressing proximal weakness.

Most patients improve over 6-12 weeks of structured rehabilitation. Full resolution may take 6-24 months.

In throwing athletes: a graduated interval throwing programme with biomechanical analysis before return to competition.

• •NICE CKS Tennis elbow - Principles are widely applied to medial epicondylalgia given the limited specific trial evidence; structured rehabilitation first, corticosteroid injection not offered.
• •BESS 2023 patient care pathway - Strong recommendations against corticosteroid injection, ESWT, and autologous blood for lateral epicondylalgia; UK practice extrapolates these to the medial side.
• •Coombes et al 2013 (JAMA) - Landmark RCT for lateral epicondylalgia: corticosteroid injection produces worse outcomes at 6 and 12 months. Underpins the medial-side anti-injection stance.
• •Cook and Purdam continuum (2009) - The pathology framework: reactive, dysrepair, degenerative. Drives the staged loading approach.
• •MCL reconstruction (Tommy John, Jobe 1986) - The reconstruction protocol for confirmed MCL insufficiency in throwing athletes; awareness-level for non-specialists.

• •Medial epicondylalgia causes pain on resisted wrist flexion and pronation - the opposite pattern to lateral epicondylalgia. Commonly tested.
• •The ulnar nerve is the critical associated structure. ALWAYS test ulnar nerve function (Tinel at cubital tunnel, ring/little finger sensation, intrinsics, Froment). Coexisting cubital tunnel syndrome is a classic SBA trap.
• •Corticosteroid injection is not favoured - same tendinopathy principles as lateral PLUS specific ulnar nerve injury risk. Position is extrapolated from lateral elbow evidence (Coombes 2013).
• •Throwing athlete with medial elbow pain: differentiate flexor-pronator tendinopathy, MCL insufficiency, and valgus extension overload. The valgus stress test at 30 degrees of flexion is the key MCL test.
• •Pronator syndrome (median nerve at the elbow) presents with numbness across the FULL median territory INCLUDING the thenar eminence - because the palmar cutaneous branch is compressed proximal to the carpal tunnel. This distinguishes it from carpal tunnel where thenar sensation is spared.
• •7-10 times less common than lateral epicondylalgia. Difficulty in exams comes from identifying coexisting pathology, not the primary diagnosis.