Heel Fat Pad Syndrome

What the heel fat pad does

Under the heel bone (calcaneus) sits a thick pad of fat, about 1 to 2 cm (0.4 to 0.8 inches) deep, organized into tiny honeycomb chambers by fibrous walls. It absorbs shock with every step, taking forces of more than twice body weight during walking and more during running. When the pad thins or the chambers break down, the heel bone is less protected, so pressure is transmitted to the bone and nerves.

Symptoms

• deep, aching or bruise-like pain in the center of the heel
• worse when walking barefoot, on hard floors or after long periods standing
• worse with impact activities such as running and jumping
• tenderness when pressing the middle of the heel pad
• pain that eases with rest and cushioning
• sometimes a heel that feels thin or bony

Heel fat pad syndrome vs plantar fasciitis

The two can coexist, and both can occur with a heel spur, which itself is usually not the cause of pain.

Causes and risk factors

• Aging: the fat pad thins and loses elasticity, especially after age 40.
• High-impact activity: running, basketball, jumping sports.
• Walking or standing on hard surfaces for long periods.
• Thin-soled or worn-out shoes, sandals or barefoot walking.
• Obesity and weight gain.
• A hard landing on the heel, which can bruise or rupture the fat pad chambers.
• Repeated corticosteroid injections into the heel, which can cause fat atrophy.
• Foot mechanics: high arches or heel-striking gait.
• Medical conditions: diabetes, rheumatoid arthritis and some connective tissue disorders.

Diagnosis

1. History and examination: location of tenderness, pain pattern, footwear and activity.
2. Ultrasound: measures fat pad thickness and compressibility.
3. MRI: shows inflammation or damage of the fat pad and other causes of heel pain.
4. X-ray: to rule out a stress fracture or other bone problems.

Doctors also consider tarsal tunnel syndrome and nerve entrapment if there is burning or tingling.

Treatment

Rest and activity changes

• reduce running, jumping and long periods of standing on hard floors
• switch to low-impact exercise such as cycling or swimming while healing

Cushioning and support

• Cushioned shoes with thick, shock-absorbing heels; replace worn-out shoes.
• Heel cups: silicone or gel cups that contain and recenter the fat pad, increasing cushioning.
• Taping around the heel to compress the fat pad.
• Avoid walking barefoot on hard floors; wear supportive slippers at home.
• Custom orthotics if foot mechanics contribute.

Pain relief

• ice for 15 minutes after activity
• acetaminophen (paracetamol) or NSAIDs, following the label dose
• avoid steroid injections into the fat pad, which can worsen atrophy

Weight management

Losing excess weight reduces load on the heel.

Advanced options

For persistent fat pad atrophy, injectable fillers or fat grafting into the heel have been used in some centers to restore cushioning, though evidence is still limited.

Outlook

Inflammation or bruising of the fat pad usually improves within weeks to a few months with rest and cushioning. Age-related atrophy does not reverse, but symptoms can be well controlled with good footwear and heel cups.

Frequently asked questions

What does heel fat pad syndrome feel like?

It feels like a deep bruise in the middle of the heel. Pain is worse when standing or walking, especially barefoot on hard surfaces, and pressing the center of the heel is tender. It typically improves with rest and cushioning.

How is heel fat pad syndrome different from plantar fasciitis?

Fat pad pain is in the center of the heel and worse on hard surfaces. Plantar fasciitis pain is toward the inner front of the heel and classically worst with the first steps in the morning or after rest. Both can occur together.

How long does heel fat pad syndrome take to heal?

Mild cases from bruising or overuse usually improve in 2 to 6 weeks with rest and cushioning. Age-related fat pad thinning is long-term but can be managed with good shoes and heel cups.

Can the heel fat pad grow back?

The fat pad does not regrow once it has thinned with age. Bruised or inflamed fat pads recover. Heel cups help by gathering and supporting the existing fat, and injectable fillers or fat grafting are options in some cases.

What shoes are best for heel fat pad syndrome?

Choose shoes with a thick, well-cushioned heel, a firm heel counter that holds the heel pad in place, and good shock absorption. Running shoes or walking shoes with gel or foam cushioning, plus a silicone heel cup, work well for many people.