The most likely reason your heel hurts when you walk is plantar fasciitis, a condition that affects roughly 10% of the population at some point in their lives. A thick band of tissue runs along the bottom of your foot, connecting your heel bone to the base of your toes. It supports your arch and absorbs shock with every step. When that tissue develops small tears from repeated stress, it becomes irritated and painful, especially under the heel.
But plantar fasciitis isn’t the only possibility. Where exactly the pain is, when it’s worst, and how it started all point toward different causes. Here’s how to make sense of what you’re feeling.
Plantar Fasciitis: The Most Common Cause
Plantar fasciitis causes a stabbing pain on the bottom of the heel, typically at its worst with your first steps in the morning. After you’ve been off your feet, the tissue tightens and shortens. When you stand up and put weight on it, those first few steps stretch the already-irritated tissue, producing that sharp jolt of pain. As you keep moving, the pain usually fades, only to return after long periods of standing or after sitting for a while.
This pattern of “hurts at first, gets better, then comes back” is the hallmark of plantar fasciitis. The pain is concentrated on the underside of the heel, often slightly toward the inner edge, and it tends to build gradually over weeks rather than appearing overnight. Body weight plays a measurable role: people with heel pain average a BMI around 30, compared to about 28 in those without it. A BMI of 25 or lower appears to meaningfully reduce the strain on the heel. Jobs that keep you on your feet, a sudden increase in activity, and tight calf muscles all raise the risk.
Most people recover within several months using straightforward measures: icing the area, consistent calf and foot stretching, and cutting back on activities that trigger the pain. Supportive shoes make a real difference. Research on cadaver feet found that a moderate heel elevation (around two inches) with support extending from the heel to the midfoot reduced tension on the plantar fascia by 75% compared to being barefoot. The key is that the support runs under the arch, not just under the heel. A block placed only under the heel bone did essentially nothing. This is why well-contoured arch support and cushioned shoes help, while walking barefoot on hard floors often makes things worse.
For cases that don’t respond to stretching and better footwear over several months, shockwave therapy is one option with reported success rates of 60 to 80%.
Heel Fat Pad Syndrome
If the pain feels more like a deep bruise right in the center of your heel, rather than a sharp stab near the arch, the problem may be your heel’s natural cushion wearing thin. A layer of specialized fat sits under the heel bone to absorb impact. Over time, or after repeated pounding, that pad loses thickness and elasticity.
The pain from fat pad atrophy is worst when walking on hard surfaces like concrete or hardwood floors, during high-impact activities like running or jumping, and when going barefoot. Pressing a thumb firmly into the middle of the heel reproduces the pain. Unlike plantar fasciitis, this pain doesn’t necessarily peak with those first morning steps. It’s more directly tied to impact.
Age is the biggest risk factor, since the fat pad naturally thins as you get older. Higher body weight accelerates the process by increasing pressure on the pad. A history of heel injuries, prolonged standing, and even family genetics can contribute. Cushioned insoles and well-padded shoes are the frontline approach, because you can’t rebuild the fat pad itself.
Achilles Tendon Problems
Pain in the back of the heel, rather than the bottom, points toward the Achilles tendon. This is the thick cord running from your calf muscles down to your heel bone, and it can become inflamed or develop small tears from overuse. The pain is typically felt where the tendon attaches to the back of the heel or slightly above it. It often worsens when pushing off during walking, climbing stairs, or after exercise. Squeezing the sides of the tendon usually reproduces the discomfort.
Achilles tendon pain and plantar fasciitis are sometimes confused because they both involve the heel area, but the location is distinctly different: bottom of the heel versus back of the heel.
Stress Fractures
A calcaneal stress fracture is a small crack in the heel bone itself, and it produces a generalized aching pain that builds gradually over days to weeks. Unlike plantar fasciitis, which tends to ease up as you walk, a stress fracture typically hurts more the longer you’re on your feet and doesn’t improve with continued movement.
One distinguishing feature: squeezing both sides of the heel with your hands reproduces the pain. With plantar fasciitis, pressing on the bottom of the heel is what hurts. Stress fractures are more common in runners, military recruits, and anyone who has rapidly increased their activity level. They also occur more often in people with low bone density.
Nerve Entrapment
Up to 20% of chronic heel pain cases involve a compressed nerve rather than a tissue or bone problem. The most common culprit is a small nerve that runs along the inner side of the heel. When it gets pinched, the pain tends to be sharp and radiating rather than localized to one spot. It often worsens at night and after physical activity, which is different from the morning-focused pattern of plantar fasciitis. Some people also notice tingling, burning, or numbness spreading across the heel or toward the outer edge of the foot.
Nerve entrapment is frequently overlooked because it mimics plantar fasciitis in its general location. If you’ve been treating heel pain for months without improvement, a trapped nerve is worth considering.
Heel Spurs: Probably Not the Cause
If you’ve had an X-ray and were told you have a heel spur, that bony growth is almost certainly not why your heel hurts. About 50% of people with plantar fasciitis have heel spurs visible on X-rays, but spurs appear just as often in people with no heel pain at all. The current medical consensus is that heel spurs are a byproduct of long-term stress on the heel, not an independent source of pain. Treatment targets the soft tissue problem, not the spur.
Heel Pain in Children and Teens
If your child is complaining of heel pain, the likely cause is Sever’s disease, which isn’t actually a disease but an irritation of the growth plate at the back of the heel. It’s most common in girls between ages 8 and 10 and boys between 10 and 12, especially those active in sports. The pain typically starts after beginning a new sport or increasing training, gets worse with running and jumping, and may cause limping or toe-walking. Squeezing the back of the heel reproduces the pain. The condition resolves on its own once the growth plate closes, usually by age 15.
How to Narrow Down Your Cause
Location is the single most useful clue:
- Bottom of the heel, near the arch: plantar fasciitis
- Dead center of the heel pad: fat pad syndrome
- Back of the heel: Achilles tendon problem
- Inner side of the heel with radiating or burning pain: nerve entrapment
- Diffuse pain that worsens with a side squeeze: possible stress fracture
Timing matters too. Pain that’s worst in the first few steps of the morning and then eases up strongly suggests plantar fasciitis. Pain that gets steadily worse throughout the day and doesn’t let up points more toward a stress fracture or fat pad problem. Pain that flares at night and includes tingling suggests nerve involvement.
For most people, the answer is plantar fasciitis, and the fix is consistent stretching, supportive footwear with good arch contour, and reducing activities that overload the heel. If your pain hasn’t improved after two to three months of those measures, or if the pattern doesn’t fit plantar fasciitis, imaging and a more targeted evaluation can help identify what’s actually going on.