Heel pain when walking is most commonly caused by plantar fasciitis, a condition where the thick band of tissue running along the bottom of your foot becomes inflamed where it attaches to your heel bone. But several other conditions can produce similar pain, and the specific location, timing, and quality of your pain are the best clues to what’s actually going on.
Plantar Fasciitis: The Most Common Cause
The plantar fascia is a tough strip of connective tissue that spans the sole of your foot from heel to toes. Plantar fasciitis develops when repeated pulling forces at the point where this tissue anchors into the heel bone cause inflammation and micro-damage. The pain is typically sharp, located on the underside of the heel toward the inner side, and worst with your very first steps in the morning.
That morning pattern has a specific explanation. While you sleep, your foot naturally points downward, allowing the inflamed tissue to tighten and contract. When you stand up and flatten your foot, the sudden stretch on that already-irritated attachment point produces a stabbing sensation. The pain often eases after a few minutes of walking as the tissue loosens, then returns after long periods of sitting or standing.
Risk factors include spending long hours on your feet, tight calf muscles, flat feet, excess body weight, and a sudden increase in activity. About 90% of people with plantar fasciitis improve with non-surgical approaches like stretching, supportive footwear, and insoles, though recovery can take weeks to months.
Pain at the Back of the Heel
If the pain is behind your heel rather than underneath it, the problem is more likely your Achilles tendon. Insertional Achilles tendinitis affects the spot where the tendon connects to the back of the heel bone. It develops from repeated stress rather than a single injury, and it’s common in runners, though anyone can develop it.
Tight or weak calf muscles, flat arches, and overpronation (ankles that roll inward when you walk) all increase your risk. Bone spurs on the back of the heel can also rub against the tendon and contribute to irritation. The pain typically worsens with activity and may be accompanied by visible swelling or tenderness right at the tendon’s attachment point.
Fat Pad Thinning
Your heel has a built-in cushion: a specialized pad of fat that absorbs shock with every step. As you age, this pad can thin out, leaving the heel bone less protected. The result is a deep, bruise-like ache centered directly under the heel that gets worse when you walk barefoot or stand for long stretches on hard surfaces.
Fat pad syndrome has a distinctly different pattern from plantar fasciitis. Research published in the Journal of Foot and Ankle Research found that pain during prolonged standing, nighttime pain, and pain in both heels all strongly pointed toward fat pad problems. Morning first-step pain, on the other hand, made fat pad syndrome very unlikely and pointed instead toward plantar fasciitis. That distinction is one of the most useful ways to tell the two apart. Fat pad syndrome is diagnosed when the cushion measures less than 3 millimeters thick on ultrasound.
Stress Fractures
A calcaneal stress fracture is a small crack in the heel bone itself, usually caused by repetitive impact. Unlike plantar fasciitis, the pain tends to be deep, aching, and diffuse rather than sharp and pinpointed. It consistently worsens with activity rather than improving after a few minutes of walking.
One classic sign is the squeeze test: if squeezing the sides of your heel with your hands reproduces the pain, a stress fracture is a real possibility. This condition is more common in runners, military recruits, and anyone who has recently ramped up high-impact activity. Because stress fractures don’t always show up on initial X-rays, they can be missed early on and may require an MRI for confirmation.
Nerve-Related Heel Pain
Heel pain that includes burning, tingling, numbness, or “pins and needles” sensations suggests nerve involvement rather than a purely structural problem. Tarsal tunnel syndrome occurs when the tibial nerve, which passes through a narrow channel on the inner side of the ankle, becomes compressed or damaged. The pain and tingling can radiate into the bottom of the foot and heel, and symptoms typically worsen during or after physical activity. In more severe cases, the discomfort becomes constant and may include muscle weakness in the foot.
Heel Pain in Children and Teens
If your child complains of heel pain, the most likely cause is Sever’s disease (calcaneal apophysitis). It’s extremely common between ages 8 and 14, especially during growth spurts. The heel bone has a growth plate that hasn’t fully hardened yet, and too much strain from running and jumping inflames that area.
A key factor is that bones often grow faster than tendons during these years, leaving the Achilles tendon unusually tight and pulling hard on the heel. High-impact sports on hard surfaces, flat feet, and excess weight all increase the risk. Sever’s disease resolves on its own once the growth plate closes, but reducing activity and stretching the calf can help manage pain in the meantime.
What About Heel Spurs?
Heel spurs get blamed for a lot of pain, but the relationship is complicated. These small bony growths on the underside of the heel show up on X-rays in 10 to 63% of people who have no heel pain at all. A large portion of people with heel spurs are completely asymptomatic. When pain is present alongside a spur, the real culprit is usually the inflamed soft tissue around it, not the spur itself. Removing a heel spur surgically without addressing the underlying fascia problem rarely solves the pain.
When Both Heels Hurt
Pain in both heels at once raises the question of a systemic inflammatory condition. Rheumatoid arthritis typically affects the same joint on both feet simultaneously, and one of its early signs in the hindfoot is difficulty walking on uneven ground. Conditions like ankylosing spondylitis and reactive arthritis can also cause bilateral heel pain by targeting the spots where tendons and ligaments attach to bone. If your heel pain came on gradually in both feet, is accompanied by joint stiffness or swelling elsewhere, or doesn’t respond to typical treatments, an inflammatory condition may be driving it.
Matching Your Symptoms to the Cause
The details of your pain matter more than the fact that it hurts. Here’s how to start narrowing it down:
- Sharp pain under the heel, worst with first morning steps, improves with walking: plantar fasciitis
- Pain at the back of the heel, worsens with activity, possible swelling: Achilles tendinitis
- Deep bruise-like ache under the center of the heel, worse barefoot or on hard floors: fat pad thinning
- Deep aching pain that steadily worsens with any weight-bearing, painful when you squeeze the heel sides: stress fracture
- Burning, tingling, or numbness radiating into the heel or sole: nerve compression
- Both heels affected, joint stiffness elsewhere: inflammatory arthritis
- Ages 8 to 14, active in sports, pain during and after running: Sever’s disease
Most heel pain responds well to rest, stretching, supportive shoes, and time. But pain that worsens steadily over weeks, doesn’t follow the typical plantar fasciitis pattern, or involves neurological symptoms like tingling deserves a closer look, since treatments differ significantly depending on the actual cause.