Heel pain that shows up without a clear injury is almost always caused by repetitive stress, structural changes, or inflammation building up over time. The most common culprit by far is plantar fasciitis, which accounts for roughly 15% of all foot problems and drives over one million doctor visits per year in the United States alone. But several other conditions can produce that same frustrating pain, and telling them apart matters for getting the right treatment.
Plantar Fasciitis: The Most Likely Cause
The plantar fascia is a thick band of tissue running along the bottom of your foot from the heel bone to the toes. Its job is to support the arch and absorb shock with every step. When this tissue gets overloaded repeatedly, it develops microtears and degenerates, producing a sharp or aching pain right at the bottom of the heel. The pain is typically worst with your first steps in the morning or after sitting for a long time, then eases somewhat as you move around.
Plantar fasciitis most commonly strikes between ages 40 and 60, with no real difference between men and women. Several things increase the load on the fascia without any single “injury” event: flat feet, high arches, tight calves, excess body weight, jobs that keep you standing on hard surfaces, and a sudden increase in walking or running. People with flat feet are especially vulnerable because their foot mechanics prevent the fascia from tightening properly during each step, placing chronic strain on its attachment point at the heel.
The good news is that most people recover within several months using straightforward measures: icing, consistent calf and foot stretches, and cutting back on whatever activity is aggravating it. Foot orthotics (shoe inserts) show moderate evidence for reducing pain over the medium term, though the improvement is modest. Notably, studies find no meaningful difference between custom-made orthotics and cheaper prefabricated versions, so an off-the-shelf option is a reasonable first step.
Achilles Tendinitis
The Achilles tendon connects your calf muscles to the back of your heel bone. When it becomes irritated from repetitive use, pain develops at the back of the heel or just above it. You don’t need to be an athlete for this to happen. Running in worn-out shoes, suddenly increasing your mileage, training on hills, or even having tight calf muscles can set it off. Flat arches, high arches, a leg-length difference, and carrying extra weight all add strain to the tendon as well.
The pain tends to feel stiff and achy after rest, then warms up with movement before worsening again after prolonged activity. Weekend warriors are particularly prone because the tendon gets loaded intensely without the gradual conditioning that protects it.
Heel Fat Pad Atrophy
Your heel has a built-in shock absorber: a thick pad of fat tissue directly under the heel bone. Over time, this pad can thin out from aging, wear and tear, genetics, or weight gain. When that cushioning shrinks, the heel bone sits closer to the ground, and every step sends more impact directly into the bone. The result is a deep, bruise-like ache that gets worse the longer you’re on your feet, especially on hard surfaces.
This condition is often confused with plantar fasciitis because both cause bottom-of-the-heel pain. The key difference is location and behavior. Plantar fasciitis pain is typically sharpest right at the front edge of the heel bone and worst with initial steps. Fat pad pain is more central, directly under the heel, and worsens steadily throughout the day rather than improving with movement. A doctor can often distinguish between the two with a physical exam, and imaging can confirm how much padding has been lost.
Bursitis at the Back of the Heel
A small fluid-filled sac called the retrocalcaneal bursa sits between the Achilles tendon and the heel bone. Its purpose is to reduce friction, but when it gets irritated, it swells and produces pain and tenderness at the back of the heel. Overuse and repetitive ankle motion are the usual triggers, making this common in runners and other athletes. Shoes that press into the back of the heel can also set it off.
Inflammatory conditions like gout and rheumatoid arthritis can inflame this bursa independently of any mechanical stress. If the pain at the back of your heel is accompanied by warmth and visible swelling, bursitis is worth considering. Switching to shoes that don’t dig into the heel and using supportive inserts often helps.
Tarsal Tunnel Syndrome
Think of this as the foot’s version of carpal tunnel syndrome. A nerve running along the inside of the ankle passes through a narrow channel called the tarsal tunnel. When that nerve gets compressed, it can send burning, tingling, or numbness into the bottom of the heel and foot. Some people describe it as a pins-and-needles sensation or an electrical feeling that radiates into the toes.
What makes tarsal tunnel syndrome different from the other causes on this list is the nature of the pain. It’s neurological rather than mechanical, so it may not follow the classic pattern of worsening with weight-bearing. In advanced cases, the small muscles that control the toes can weaken. Diagnosis usually involves nerve conduction tests that measure how well electrical signals travel through the affected nerve.
Systemic Inflammatory Conditions
Sometimes heel pain isn’t a foot problem at all. It’s a signal from a condition affecting the whole body. Two worth knowing about are ankylosing spondylitis and gout.
Ankylosing spondylitis is a type of inflammatory arthritis that primarily targets the spine but frequently attacks the spots where tendons and ligaments attach to bone, a process called enthesopathy. The heel is one of the most common sites. In one study of patients with coexisting ankylosing spondylitis and gout, over 50% experienced heel pain, with a third reporting it as chronic. The pain can be persistent and dull, or it can flare acutely.
Gout, caused by uric acid crystal buildup, can also strike the heel and mimic other conditions. If your heel pain comes on suddenly with intense swelling and redness, or if you have a history of painful joint flares elsewhere (especially the big toe), gout is a possibility your doctor can check with blood work or joint fluid analysis.
Heel Pain in Children and Teens
If your child complains of heel pain, the most likely explanation is Sever’s disease, a growth-related condition that is extremely common between ages 8 and 14. During growth spurts, the heel bone grows faster than the surrounding muscles and tendons, creating tension where the Achilles tendon attaches. The result is pain that worsens with activity and when the sides of the heel are squeezed.
Sever’s disease isn’t dangerous, but it can be persistent. If the stress on the heel can’t be reduced through rest and activity modification, symptoms may last until the growth plate fully matures, which typically happens by age 15. Supportive shoes, heel cups, and stretching the calves usually manage the discomfort in the meantime.
When Heel Pain Needs Urgent Attention
Most non-injury heel pain is manageable and resolves with time. But certain signs suggest something more serious. Seek prompt medical attention if you have severe pain and swelling near the heel, if you can’t bend your foot downward or stand on your toes, if the pain comes with fever, or if you notice numbness or tingling in the heel. These can point to stress fractures, infections, or nerve damage that require imaging or specialist evaluation rather than a wait-and-see approach.