Heel pain most often comes from plantar fasciitis, a condition where the thick band of tissue running along the bottom of your foot develops tiny tears from repeated stress. But several other structures in and around your heel can generate pain, and the location, timing, and quality of that pain point to different causes. Understanding the pattern of your symptoms is the fastest way to narrow down what’s going on.
Plantar Fasciitis: The Most Common Cause
The plantar fascia is a tough strip of connective tissue that spans from your heel bone to the base of your toes, acting like a bowstring that supports your arch. When forces on this tissue exceed what it can handle, small tears develop. Your body mounts an inflammatory response to repair those tears, and that’s where the pain begins.
What makes plantar fasciitis distinctive is its timing. It typically causes a stabbing pain in the bottom of your foot, near the heel, that’s worst with your very first steps in the morning. As you move around, the tissue warms up and loosens, and the pain fades. But it often returns after long periods of standing or when you get up after sitting for a while. If stretching temporarily reduces the pain, that’s another signal pointing toward the plantar fascia.
Over time, if the tissue doesn’t fully heal between bouts of stress, plantar fasciitis can shift from an inflammatory problem to a degenerative one. Tissue samples from people with chronic cases often show collagen breakdown and disorganized tissue growth rather than active inflammation. This is why long-standing heel pain can be stubborn: the tissue structure itself has changed, not just the immune response around it. Risk factors include being on your feet for long hours, a sudden increase in activity, tight calf muscles, higher body weight, and flat feet or very high arches.
Achilles Tendon Problems
If your pain is at the back of the heel rather than the bottom, the Achilles tendon is a likely suspect. Achilles tendinopathy produces an achy pain that can turn sharp with increased activity or direct pressure. You might notice tenderness along the tendon itself, and in some cases a visible thickening or bump where the tendon meets the heel bone. Pointing your toes upward (stretching the tendon) tends to make the pain worse.
A related condition called a Haglund deformity involves a bony bump at the top of the heel bone where the Achilles tendon attaches. This bump can irritate surrounding tissue, especially when shoes press against it. The pain sits right at the upper edge of the back of the heel, and it’s often aggravated by stiff-backed shoes.
Heel Fat Pad Syndrome
Your heel has a built-in cushion: a pad of fatty tissue roughly 1 to 2 centimeters thick that absorbs shock every time your foot hits the ground. When this pad thins out or loses its elasticity, the heel bone takes more direct impact, causing a deep, bruise-like ache in the center of the heel.
Several things accelerate fat pad breakdown. Age is a big one, as the pad naturally loses volume and springiness over time. High-impact sports like basketball, tennis, running, and gymnastics pound the heel repeatedly. Prolonged standing, higher body weight, going barefoot on hard surfaces, and previous corticosteroid injections into the heel can all contribute. Unlike plantar fasciitis, fat pad pain doesn’t follow that classic “worst in the morning, better with movement” pattern. It tends to hurt whenever you’re bearing weight on a hard surface, and the heel itself may feel noticeably stiff or hard to the touch.
Stress Fractures
A stress fracture in the heel bone (calcaneus) is a hairline crack caused by cumulative overuse rather than a single injury. The pain pattern is nearly the opposite of plantar fasciitis: it gets worse the more you move and eases when you rest. Swelling around the heel is more common with a stress fracture than with soft tissue problems. One useful self-check is the squeeze test. If you place your thumb on the inside of your heel and your fingers on the outside and squeeze, pain from that compression suggests the bone itself is involved rather than the tissue on the bottom of your foot.
Stress fractures are more common in runners who ramp up mileage too quickly, people with low bone density, and those who spend long hours on their feet on hard surfaces. They require imaging to confirm and a significant period of rest to heal.
Nerve Entrapment
Tarsal tunnel syndrome occurs when a nerve running along the inside of your ankle gets compressed as it passes through a narrow channel near the ankle bone. The symptoms feel distinctly different from muscle or tendon pain. Instead of a dull ache or sharp stab, you’re more likely to notice burning, tingling, numbness, or a “pins and needles” sensation on the inside of the ankle or the bottom of the foot. Some people also experience weakness in the small muscles of the foot. The sensations may worsen after prolonged standing or walking and can radiate from the ankle into the heel and arch.
Heel Pain in Children and Teens
If your child complains of heel pain, especially during a growth spurt or a busy sports season, the most likely explanation is Sever’s disease (calcaneal apophysitis). It’s not actually a disease but an inflammation of the growth plate at the back of the heel, right where the Achilles tendon attaches. The growth plate is softer and more vulnerable to repetitive stress than mature bone, and the rapid changes in bone length during growth spurts can pull on this area.
Pain from Sever’s disease typically worsens with activity, particularly running and jumping, and improves with rest. Squeezing the sides of the heel often reproduces the pain. It resolves on its own once the growth plate matures and hardens, but reducing activity and using supportive footwear in the meantime helps manage discomfort.
How to Tell the Difference
The location and behavior of your pain are the two most useful clues:
- Bottom of the heel, worst with first morning steps, improves with movement: plantar fasciitis.
- Back of the heel, achy or sharp, worse with activity and pressure: Achilles tendinopathy or Haglund deformity.
- Center of the heel, deep bruise feeling, worse on hard surfaces: fat pad syndrome.
- Worsens steadily with activity, improves with rest, swelling present: possible stress fracture.
- Burning, tingling, or numbness along the inner ankle and sole: nerve entrapment.
- Child or teen with heel pain during a growth spurt: Sever’s disease.
Many of these conditions share overlapping risk factors: tight calves, unsupportive shoes, sudden increases in activity, prolonged time on hard surfaces, and higher body weight. Addressing those factors helps regardless of the specific diagnosis. But because the right treatment varies considerably (rest and offloading for a stress fracture, stretching and arch support for plantar fasciitis, cushioning for fat pad loss), identifying the correct cause matters for getting better efficiently rather than just managing symptoms.