That Hard Bump on the Back of Your Heel — and Why It Hurts

If you have noticed a bony lump on the back of your heel, right where your Achilles tendon meets your heel bone, you may have what’s called a Haglund’s deformity. It is also called a “pump bump” because it is notoriously aggravated by shoes with a rigid back — the kind that press directly against the bump with every step.

The enlargement itself is bony, which means it is not going anywhere on its own. But the pain that comes from it is usually very treatable without surgery. What actually hurts in most cases is not the bone but the soft tissue around it — the retrocalcaneal bursa (a small fluid-filled sac that cushions the Achilles tendon), the tendon itself, and the skin over the bump. Our podiatrists diagnose and treat Haglund’s deformity at our Coon Rapids and Golden Valley offices, serving patients across the north and west metro including Maple Grove, Ham Lake, Andover, Champlin, Blaine, Plymouth, Wayzata, Minnetonka, St. Louis Park, and Edina.

Persistent heel pain at the back of the heel — not the bottom — that has lasted more than two to three weeks is worth evaluating. Haglund’s, Achilles tendinopathy, and retrocalcaneal bursitis are often present at the same time and need to be sorted out separately to treat effectively.

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What Is Haglund’s Deformity?

Haglund’s deformity is a bony enlargement of the posterior-superior aspect of the calcaneus — the back-upper corner of the heel bone, about where the Achilles tendon inserts. The body gradually builds up extra bone at this site, creating a prominence that is visible and palpable through the skin.

The bony prominence itself is only part of the problem. As the enlargement grows, it creates a structural conflict with two important soft tissues in the area:

• The retrocalcaneal bursa — a small fluid-filled sac that normally cushions the space between the Achilles tendon and the heel bone. When the bony prominence enlarges, it compresses and irritates this bursa, causing retrocalcaneal bursitis. This is the primary source of pain for most patients.
• The Achilles tendon insertion — the tendon itself can be irritated, compressed, and over time can develop insertional Achilles tendinopathy where it meets the enlarged bone. When Haglund’s deformity and insertional Achilles tendinopathy occur together, this is sometimes called Haglund’s syndrome.

Additionally, rigid shoe backs press against the prominence from the outside, causing skin irritation, redness, and sometimes blistering on the surface of the bump. This external pressure is what gives the condition its “pump bump” nickname.

What Causes Haglund’s Deformity?

The exact cause is not completely understood, and there is a genetic component — it tends to run in families and often develops on both feet. Beyond heredity, several factors contribute to its development and to how painful it becomes:

• High-arched feet — a cavus or high-arch foot type tilts the heel bone in a way that shifts the back of the heel bone upward and outward, making it more likely to irritate the bursa and the tendon insertion
• Tight Achilles tendon — a shortened calf-Achilles complex increases compressive and tensile forces at the insertion site, accelerating the irritation of both the bony prominence and the surrounding soft tissue
• Rigid or tight shoe backs — shoes with stiff heel counters or backs that sit high on the heel (pumps, dress shoes, ice skates, hockey skates, ski boots) directly press against the prominence, causing external irritation
• Overuse and repetitive stress — runners, skaters, and others who place high repetitive demand on the heel are at elevated risk
• Gait abnormalities — walking with the heel rolling inward or outward can change the mechanics of how the Achilles pulls on the insertion, increasing irritation at the prominence

Symptoms of Haglund’s Deformity

The hallmark is a visible, palpable bump at the back of the heel, but the symptom picture is usually broader:

• A firm, bony lump on the back of the heel, visible and felt through the skin
• Pain at the back of the heel, often described as aching or sharp, worse after rest and with the first steps of the day
• Pain and irritation that is notably aggravated by shoes with rigid backs
• Swelling and redness around the bump, particularly after activity or after wearing aggravating shoes
• Skin discoloration, thickening, or blistering over the prominence from repeated shoe pressure
• Pain that worsens with increased activity, particularly running, walking uphill, or any motion that loads the Achilles
• In more advanced cases, swelling inside the heel from bursitis, or a thickened, tender Achilles tendon

Haglund’s deformity almost always develops on both feet, though the severity can differ significantly between sides.

What makes this different from a heel spur: A heel spur is a bony growth on the underside of the heel, associated with plantar fasciitis and pain on the bottom of the foot. Haglund’s is a prominence on the back of the heel bone at the Achilles attachment. They can coexist in the same patient, but the location of pain, the aggravating factors, and the treatment are different.

How Is Haglund’s Deformity Diagnosed?

Diagnosis is usually straightforward on clinical grounds — the combination of a visible posterior heel prominence with the characteristic pain pattern is recognizable. At your visit, we will examine the back of your heel, assess your Achilles tendon, check your foot type and arch height, and evaluate your range of motion. We will also discuss your footwear, since shoe type is often the most important factor in both cause and management.

Imaging helps confirm the diagnosis and assess associated soft tissue involvement:

• X-ray — a lateral (side view) X-ray of the heel confirms the bony prominence and allows us to measure its extent. It also identifies any calcification within the Achilles tendon at the insertion and rules out other bony pathology.
• Diagnostic ultrasound — occasionallyperformed in-office, ultrasound lets us see the retrocalcaneal bursa directly — whether it is inflamed and fluid-filled — and assess the condition of the Achilles tendon at its insertion.
• MRI — occasionally used to fully characterize soft tissue involvement, or when the clinical picture is complex. Typically performed before surgery for surgical planning purposes.

Treatment Options at Family Foot & Ankle Clinic

The bony enlargement of Haglund’s deformity does not resolve without surgery, but the pain from it absolutely can. The goal of conservative treatment is to reduce the irritation of the surrounding soft tissue, reduce compressive forces at the Achilles insertion, and modify the environmental factors — primarily footwear — that are driving the symptoms.

Tier 1 — First-Line Home Care

Change your shoes. This is the single most impactful immediate step for most patients. Avoid shoes with a rigid, high back that contacts the bump. Open-backed shoes, shoes with a soft or flexible heel counter, or shoes with a lower heel opening significantly reduce external irritation. See our Shoe Recommendations Guide for specific current picks.

Ice the area. Apply an ice pack wrapped in a thin towel to the back of the heel for 15 minutes after activity to reduce bursal inflammation. Do not apply ice directly to skin. Ice is most useful during flares or when the area is actively swollen and warm.

Anti-inflammatories. Over-the-counter NSAIDs such as ibuprofen can reduce pain and bursal inflammation short-term. Follow package directions and check with us if you have any concerns.

Calf stretching. A tight Achilles-calf complex is one of the major drivers of symptoms, because it increases the compressive and tensile load at the insertion. The same calf stretching routine used for Achilles tendinitis applies here — standing calf stretch with straight and bent knee, performed consistently morning and evening. Our Achilles Tendon Home Care Program covers this in detail.

Tier 2 — In-Office Treatments

Heel lift. A heel lift inside the shoe raises the heel slightly, which reduces the angle of the Achilles tendon pull at the insertion and decreases compressive force on the bony prominence. This provides meaningful relief for many patients and is often the first in-office intervention. It is a short-to-medium-term tool, not a permanent fix.

Custom orthotics. For patients with high arches or gait abnormalities contributing to the condition, custom orthotics address the underlying mechanics. They can also be built with a rear-foot modification that offloads the Achilles insertion directly. More on our Custom Orthotics page.

Heel padding and cushioning. U-shaped padding placed around the prominence can offload the bony bump from direct shoe pressure, reducing external irritation without requiring a complete shoe change.

Immobilization. In cases with significant Achilles involvement or refractory bursitis, a period in a removable walking boot removes load from the area entirely and allows the soft tissue to settle.

Aspiration and corticosteroid injection. If the retrocalcaneal bursa is acutely inflamed and fluid-filled, aspiration (draining the bursa) can provide rapid relief. A corticosteroid injection into the bursa reduces inflammation, though we use these carefully in proximity to the Achilles tendon.

Physical therapy. A PT program addressing calf flexibility, Achilles eccentric strengthening, and gait modification is an important part of comprehensive conservative management, particularly when insertional Achilles tendinopathy is also present.

Tier 3 — Advanced Option: Shockwave Therapy (EPAT)

Shockwave therapy (EPAT). When Haglund’s deformity is complicated by insertional Achilles tendinopathy — which is common — shockwave therapy is a strong option for the tendon component of the condition. Shockwave is most effective on tissue that has become chronically thickened and degenerated at the insertion, which is exactly what happens in long-standing Haglund’s syndrome. Acoustic pressure waves stimulate the tendon’s own healing response and help break down the fibrotic changes at the insertion site. It is non-invasive, no needles, no surgery, no downtime — you walk in and out. A typical course is six sessions. Shockwave does not reduce the bony prominence itself, but it addresses the soft tissue pathology that drives the pain. Insurance does not cover shockwave; it is offered as a cash-pay service with package pricing available. → See our Shockwave Therapy (EPAT) page.

When Is Surgery Needed?

Surgery for Haglund’s deformity is genuinely uncommon. It is considered only when an extended course of conservative treatment — typically at least six months of consistent effort — has failed to produce meaningful relief. When surgery is indicated, the procedure involves removing the bony prominence and any inflamed tissue in the heel.

The majority of patients with Haglund’s deformity manage their symptoms well with conservative care and lifestyle modification. Having the prominent bump does not automatically mean surgery is in your future — it means you have a structural risk factor that we help you manage. Most patients find a combination of the right footwear, calf flexibility work, orthotics, and occasional flare management gives them a fully functional, comfortable heel.

Long-Term Care & Prevention

Because the bony prominence does not resorb, long-term management focuses on reducing the factors that irritate the surrounding tissue:

• Avoid shoes with rigid, high backs that press against the heel prominence — this is the most important single lifestyle change
• Keep calf stretching consistent, even after pain resolves — a flexible calf means less compressive force at the Achilles insertion
• Wear your orthotics as directed if foot type is a contributing factor
• Warm up before activity, particularly running or any exercise that heavily loads the Achilles
• Address flare-ups early with ice and NSAIDS rather than letting them build into prolonged bursitis
• Return to our office if a new flare does not settle within two to three weeks of home management

Frequently Asked Questions

Will the bump go away on its own?

No — the bony prominence of Haglund’s deformity does not resolve without surgical removal. But this is rarely the relevant question. What most patients actually want is for the pain to go away, and that is very achievable without removing the bone. The goal of conservative treatment is to reduce the irritation of the soft tissue around the bump, not to eliminate the bump itself.

Is Haglund’s the same as a heel spur?

No, though both involve bony changes at the heel. A heel spur is a growth on the underside of the heel where the plantar fascia attaches — it causes pain on the bottom of the foot and is associated with plantar fasciitis. Haglund’s deformity is a prominence on the back-upper corner of the heel bone where the Achilles attaches — it causes pain at the back of the heel. Some patients have both, but they are separate conditions with different treatment approaches.

Do I have to stop wearing my usual shoes permanently?

Not necessarily permanently, but the shoes that are aggravating the bump will need to be changed or modified during active treatment. Open-backed shoes, athletic shoes with soft heel counters, and shoes with a lower heel opening typically work well. Some patients find they can return to their preferred footwear once the soft tissue irritation settles; others find certain styles are simply not compatible with their heel anatomy long-term. Our Shoe Recommendations Guide has specific suggestions that work well for this condition.

Can shockwave therapy fix Haglund’s deformity?

Shockwave does not reduce the bony enlargement, but it can significantly address the insertional Achilles tendinopathy and soft tissue pathology that are driving the pain. For patients who have both Haglund’s and insertional tendinopathy — which is common — shockwave is a meaningful component of treatment. It addresses the chronically degenerated and thickened tendon tissue at the insertion, which conservative stretching and orthotics alone often cannot fully resolve.

What is the difference between Haglund’s deformity and Haglund’s syndrome?

Haglund’s deformity refers specifically to the bony prominence of the calcaneus. Haglund’s syndrome refers to the combination of that bony prominence with retrocalcaneal bursitis, often also accompanied by insertional Achilles tendinopathy. Most symptomatic patients actually have the syndrome rather than just the isolated deformity, since the three components tend to develop together.

I’ve had this bump my whole life. Does it need to be treated now?

Not if it is not painful or functionally limiting. A Haglund’s prominence that is not symptomatic does not require treatment. If it has recently become painful, or if pain has been building gradually over time, that is when it is worth having it evaluated and getting ahead of the problem before it becomes a chronic bursitis. If you have already seen someone for this without lasting relief, our Second Opinion / Foot Pain Not Improving visit is worth considering.

Bony Bump on the Back of Your Heel? Let’s Sort It Out.

Haglund’s deformity is very manageable once you know what you are dealing with and have the right plan. Book an appointment at our Coon Rapids or Golden Valley office and we will give you a clear diagnosis and a practical path forward.

Call 763-421-7300  |  Book online at familyfootmn.com/request-appointment/Serving Coon Rapids, Golden Valley, Maple Grove, Champlin, Blaine, Plymouth, Andover, Wayzata, Minnetonka, Edina, and all Twin Cities communities

Related Services & Conditions

• Achilles Tendinitis & Tendinosis
• Shockwave Therapy (EPAT)
• Custom Orthotics
• Heel Spurs
• Plantar Fasciitis
• Second Opinion / Foot Pain Not Improving