Heel spurs are bony growths that develop on the underside of the heel bone where it connects to the tough band of tissue running along the bottom of your foot. They form gradually as calcium deposits build up in response to repeated stress on the heel. The surprising part: most people who have them never know it. In population studies, roughly 38% of people have some type of heel spur, and many experience no pain at all.
How Heel Spurs Form
Your heel bone absorbs the majority of your body weight with every step. Over time, repetitive impact creates microtrauma at the point where soft tissue attaches to the bone. Your body responds by laying down new bone in the stressed area, much the way a callus forms on skin that’s repeatedly rubbed. This process follows a basic principle of bone biology: bone adapts to the loads placed on it, growing thicker and forming new structures along the lines of force.
A single injury won’t trigger a heel spur. Research shows that it takes repeated low-force impacts to initiate the changes that lead to spur formation, though higher impact forces require fewer repetitions to cause the same effect. The spur itself is made of mature bone with active remodeling happening at its surface, meaning it’s a living structure that continues to change over time rather than a static lump of calcium. Some people also appear to have a genetic tendency to form new bone more readily in response to mechanical stress.
The Connection to Plantar Fasciitis
Heel spurs and plantar fasciitis are closely linked but not the same thing. Plantar fasciitis is inflammation or degeneration of the thick tissue band connecting your heel to your toes. A heel spur is a bony projection that often develops in the same area. People with heel pain are almost five times more likely to have a calcaneal spur than people without pain, but the spur itself usually isn’t what hurts.
In a study of 109 patients with plantar fasciitis, about 76% had a visible heel spur on imaging. These spurs came in different shapes (horizontal, vertical, or hooked) and sizes, but neither shape nor size correlated with how much pain people felt before treatment. In other words, a large spur didn’t mean worse pain, and a small one didn’t mean less. This is why many specialists view heel spurs as a sign that the area has been under chronic stress rather than as the direct source of the problem.
What Heel Spur Pain Feels Like
Most heel spurs cause no symptoms. When pain does occur, it closely mirrors plantar fasciitis pain: an intense stabbing sensation on the bottom of the heel, worst with the first steps of the morning or after sitting for a long period. The pain typically eases as you walk and the tissue loosens up, then returns when you stand again after resting. It tends to come and go throughout the day rather than staying constant.
The morning pain happens because the tissue along the bottom of your foot tightens and contracts while you sleep. When you suddenly put weight on it, the already stressed and inflamed area is forced to stretch rapidly, producing that sharp jolt. As the tissue warms up with movement, the pain fades, only to return after your next period of rest.
Risk Factors
Several factors increase your likelihood of developing heel spurs:
- Flat feet or excessive pronation. When your arch collapses inward, it increases tension on the tissue connecting to the heel bone. People with heel pain are more likely to have flat feet.
- Age and body weight. Higher BMI puts more force through the heel with each step, and the natural fat pad under your heel thins and loses elasticity over the years, reducing its ability to cushion impact.
- Prolonged standing. Jobs or activities that keep you on your feet for hours multiply the repetitive forces that drive spur formation.
- Poor footwear. Rigid, dense shoes that restrict natural foot movement, high heels, and footwear without adequate arch support are all associated with heel spur development and progression.
- Limited ankle flexibility. Decreased ability to flex your foot upward (dorsiflexion) shifts more stress to the heel and plantar fascia during walking.
How Heel Spurs Are Diagnosed
Heel pain is usually diagnosed based on where it hurts, when it hurts, and how it responds to pressure during a physical exam. Imaging isn’t always necessary to start treatment, but when it’s used, a standard X-ray is the most straightforward way to confirm a spur. The bony projection shows up clearly on lateral (side-view) foot X-rays.
Ultrasound and MRI are more commonly used to evaluate the soft tissue around the spur. On ultrasound, people with heel pain typically have a plantar fascia that’s about 2 to 3 mm thicker than normal. These imaging tools can also reveal swelling in the tissue, increased blood flow indicating active inflammation, and changes in the bone itself. Since many spurs are painless and discovered incidentally, imaging helps determine whether the spur is part of a broader problem or just an incidental finding.
Treatment Without Surgery
Conservative treatment is the standard first approach and works for the majority of people. The core strategies are stretching, supportive footwear, cushioning insoles, and anti-inflammatory medication when needed.
Stretching is particularly effective. One study found that 92% of patients were satisfied with a stretching-based treatment approach, and 77% reported no problems or limitations performing the exercises. Stretches targeting the Achilles tendon appear to be more effective than other methods. A wall calf stretch, where you lean into a wall with one foot behind you and gently press your back heel toward the floor, is one of the simplest and most commonly recommended. Rolling a tennis ball or frozen water bottle under your foot and towel stretches for your toes also help loosen the tissue along the bottom of the foot.
Medical-grade heel insoles redistribute pressure away from the spur and support the arch, reducing the repetitive forces that caused the problem. In one comparative study, about 31% of patients using a combination of rest, heel insoles, and anti-inflammatory medication experienced favorable results. While that number sounds modest, many patients in conservative treatment groups improve gradually over weeks to months rather than showing dramatic short-term gains.
Minimalist, flexible footwear has also shown benefit. Shoes that allow natural foot movement rather than locking the foot into a rigid position can reduce the biomechanical stress that drives spur-related pain. Avoiding completely flat shoes and high heels in favor of supportive, cushioned options with a slight heel-to-toe drop is a practical starting point.
When Surgery Is Considered
Surgery for heel spurs is uncommon and typically reserved for people who’ve tried conservative treatment for six months to a year without meaningful improvement. The procedure involves removing the spur and sometimes releasing part of the plantar fascia to relieve tension.
Recovery depends on what you do for a living. Desk workers can often return to their routine within a few days to a couple of weeks. If your job involves lifting heavy objects or being on your feet, expect several weeks or longer before you’re back to full activity. The overall recovery window ranges from a few days to several weeks, with gradual improvement as the surgical site heals.