Question 1

What is the difference between Achilles tendinitis and retrocalcaneal bursitis?

Accepted Answer

Achilles tendinitis (or tendinopathy) and retrocalcaneal bursitis are distinct conditions that both cause posterior heel and Achilles pain -- they frequently coexist and are clinically confused, but identifying the primary diagnosis is important because the treatments, while overlapping, differ in key ways. The anatomy of the posterior heel: the Achilles tendon inserts onto the posterior calcaneus (heel bone); directly between the Achilles insertion and the bone lies the retrocalcaneal bursa -- a small, fluid-filled sac that normally cushions the tendon-bone interface; just superficial to the Achilles tendon near its insertion is the superficial calcaneal (subcutaneous) bursa (less commonly affected). Achilles tendinopathy: the pathology is within the tendon tissue itself; degenerative changes (disorganized collagen, neovascularization, mucoid degeneration) occur within the tendon in response to repetitive overload; two forms: non-insertional tendinopathy (the most common) -- affects the tendon 2-6cm above the calcaneal insertion; the mid-substance tendon is thickened, tender, and may show a palpable nodule; insertional tendinopathy -- affects the tendon at its attachment to the calcaneus; produces posterior heel pain directly at the bone; often associated with a Haglund's deformity; pain pattern in tendinopathy: stiffness and pain with the first steps of the morning (the tendon has cooled and stiffened overnight); warmup phenomenon (pain improves with initial walking then may return with prolonged activity); the tendon is tender along its length. Retrocalcaneal bursitis: the pathology is within the bursa between the Achilles and the bone; the bursa becomes inflamed, thickened, and filled with excess fluid; pain is precisely at the posterior heel, in the recess just anterior to the Achilles insertion; tenderness is elicited by pressing with a fingertip from either side into the recess directly in front of the Achilles insertion (the 'two-finger squeeze' at the Achilles-calcaneal junction); the pain is pinpoint focal at the bursa location rather than along the tendon length.

Question 2

What is a Haglund's deformity and how does it cause pain?

Accepted Answer

Haglund's deformity -- sometimes called 'pump bump' -- is an osseous enlargement of the posterior-superior calcaneus (heel bone) that creates a bony prominence that impinges on the Achilles tendon and retrocalcaneal bursa during ankle plantarflexion. The mechanism of Haglund's pain: the normal posterior-superior calcaneus has a rounded contour that allows the Achilles tendon to slide freely over it during ankle motion; a Haglund's deformity has a prominent, enlarged bony projection at the posterosuperior calcaneus; during plantarflexion (pointing the foot, going on tiptoe, or pushing off during walking), the Achilles tendon and the retrocalcaneal bursa are compressed between the Haglund's prominence and the posterior shoe heel counter; this repetitive compression produces: retrocalcaneal bursitis (inflammation and thickening of the bursa); insertional Achilles tendinopathy from repeated impingement; eventually, calcific deposits within the tendon insertion in chronic cases; the 'pump bump' nickname: rigid high-heeled shoes (pumps, dress shoes with firm heel counters) create the most impingement on the Haglund's prominence because the heel counter sits directly on the bony enlargement; patients commonly notice that pain is worse in rigid-backed shoes and relieved by open-back shoes (sandals, clogs); diagnosis: the Haglund's deformity is visible on lateral ankle X-ray as a prominent projection at the posterosuperior calcaneus; the parallel pitch lines measurement on X-ray quantifies the degree of deformity; MRI demonstrates the associated bursitis and tendinopathy; management: the Haglund's deformity cannot be corrected without surgery -- all conservative treatments manage the inflammation; conservative: heel lifts to reduce impingement angle, open-back or soft-backed shoes, physical therapy, corticosteroid injection (with caution near the Achilles tendon); surgery: calcaneal osteotomy (removing or reshaping the prominence) combined with retrocalcaneal bursectomy produces excellent outcomes in appropriately selected patients.

Question 3

How do you treat Achilles tendinitis vs. bursitis?

Accepted Answer

Achilles tendinopathy and retrocalcaneal bursitis share several treatment elements but diverge at the injection and loading protocol stages -- bursitis tolerates corticosteroid injection better, while tendinopathy management is built around heavy-load eccentric and isometric exercise. Treatment shared by both conditions: heel lift: a 8-12mm heel lift (in both shoes simultaneously) reduces the tensile load on the Achilles tendon and the impingement on the retrocalcaneal bursa; provides rapid symptom reduction; footwear modification: eliminate rigid heel counters that directly compress the posterior heel; switch to shoes with soft or structured (not rigid) heel backs; sandals and clogs are appropriate alternatives during the treatment period; activity modification: reduce running volume by 50% and eliminate hill work and track workouts; maintain fitness with low-impact alternatives (cycling, swimming); ice: 15-20 minutes after activity reduces post-exercise inflammation. Treatment specific to Achilles tendinopathy: heavy-load eccentric and isometric exercise -- the most evidence-supported treatment for Achilles tendinopathy: eccentric heel drops on a step (the Alfredson protocol): the affected leg raises the body up on both legs, then lowers on the affected leg alone; 3 sets of 15 repetitions twice daily; performed on both a straight knee (gastrocnemius) and bent knee (soleus); the load should be heavy enough to provoke mild discomfort (3-5/10 pain during exercise is acceptable and indicates the therapeutic load); isometric holds: sustained calf contraction at mid-range for 5 x 45-second holds; effective for reducing tendon pain acutely; PRP (platelet-rich plasma) injection for refractory insertional or mid-portion tendinopathy; Treatment specific to retrocalcaneal bursitis: corticosteroid injection into the retrocalcaneal bursa (not into the tendon): provides rapid reduction of bursal inflammation; must be precisely placed into the bursa rather than the tendon; the injection is generally safe in the bursa (unlike intratendinous injection); ultrasound guidance improves accuracy; aspiration: if the bursa contains significant fluid, aspiration provides immediate relief; may be combined with corticosteroid injection.

Question 4

Can Achilles tendinitis and bursitis be cured without surgery?

Accepted Answer

The large majority of Achilles tendinopathy and retrocalcaneal bursitis cases resolve without surgery -- but the timeline is longer than most patients expect, and premature return to activity is the most common reason for treatment failure. Expected outcomes with conservative treatment: non-insertional Achilles tendinopathy (mid-portion): the most responsive to conservative management; with a genuine eccentric exercise protocol (Alfredson protocol performed consistently for 12 weeks), 70-80% of patients achieve good-to-excellent outcomes; the tendon does not return to its pre-injury microstructure on MRI, but functional outcomes correlate poorly with imaging -- many patients with persistent MRI abnormalities are clinically pain-free; insertional Achilles tendinopathy (at the calcaneal attachment): less responsive to eccentric exercise (paradoxically, the classic Alfredson protocol performed off a step can aggravate insertional tendinopathy by increasing tendon compression at the insertion); isometric loading and heavy slow resistance training are preferred; outcomes with consistent treatment: 60-70% good-to-excellent at 6 months; retrocalcaneal bursitis: responds well to corticosteroid injection combined with footwear modification and physical therapy; the bursa can reduce to near-normal size with appropriate management; isolated retrocalcaneal bursitis (without significant Haglund's deformity or tendinopathy) has the best prognosis; retrocalcaneal bursitis associated with Haglund's deformity: the bursitis can be managed, but the underlying structural cause (the bony prominence) persists and creates a higher recurrence risk; patients with Haglund's who cannot tolerate any firm heel counter and have failed conservative management multiple times are appropriate candidates for surgical consultation. Surgical success rates (for failed conservative management): endoscopic retrocalcaneal bursectomy with calcaneal osteotomy: 85-90% good-to-excellent outcomes; recovery: 3-4 months to return to sports; Achilles debridement (for mid-portion tendinopathy): 80-85% good outcomes; recovery: 4-6 months.

Achilles Tendinitis vs Bursitis 2026 | Podiatrist

Achilles Tendinitis vs Bursitis: What’s the Difference?

Key Differences

When to See a Podiatrist

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In-Office Treatment at Balance Foot & Ankle

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Achilles Tendinitis vs Bursitis: What’s the Difference?

Key Differences

When to See a Podiatrist

Schedule with Dr. Tom

In-Office Treatment at Balance Foot & Ankle

Ready to Get Relief?

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