Heel pain most often comes from plantar fasciitis, a strain of the thick band of tissue that runs along the bottom of your foot. But several other conditions can cause it too, and the location, timing, and quality of the pain point toward different problems. Understanding where exactly your heel hurts and when the pain is worst helps narrow down what’s going on.
Plantar Fasciitis: The Most Common Cause
Plantar fasciitis produces an aching pain on the underside of your heel or along the arch of your foot. The hallmark symptom is pain with your first steps after sleeping or sitting for a while. That initial stiffness and sharp discomfort usually eases after a few minutes of walking as the tissue warms up, but it can return after long periods on your feet.
The plantar fascia is a tough band of connective tissue that supports your arch, stretching from your heel bone to the base of your toes. When it’s overloaded through repetitive stress, whether from running, standing all day, weight gain, or tight calf muscles, tiny tears develop where the fascia attaches to the heel bone. Over time, this leads to inflammation, thickening, and pain. The condition is gradual. Most people notice it creeping in over weeks rather than appearing suddenly.
Heel Spurs: Often Not the Real Problem
Many people assume a bony heel spur is causing their pain, but the relationship between spurs and symptoms is surprisingly weak. Plantar spurs show up on X-rays in roughly 11 to 16 percent of people who have no heel pain at all, and some studies have found asymptomatic spurs in up to 30 percent of examined populations. A spur on an X-ray doesn’t mean it’s the source of your pain. In most cases, the soft tissue irritation around the spur, typically plantar fasciitis, is what actually hurts.
Achilles Tendinitis
If your pain is at the back of your heel rather than the bottom, Achilles tendinitis is a likely culprit. This condition comes in two forms. The more common type affects the middle portion of the tendon, where fibers begin to break down, swell, and thicken. The insertional type affects the lower portion where the tendon attaches directly to the heel bone, producing pain right at the back of the heel itself.
Both types cause stiffness and tenderness along the tendon, often worse in the morning or after periods of rest. Swelling around the tendon and a feeling of weakness in the leg are also common. Insertional Achilles tendinitis can be tricky because its location overlaps with another condition: retrocalcaneal bursitis.
Bursitis Behind the Heel
A small fluid-filled sac sits between the Achilles tendon and the heel bone, cushioning the space where they meet. When this sac becomes inflamed, it causes retrocalcaneal bursitis, sometimes called Haglund’s syndrome. The pain and swelling sit slightly deeper and higher on the back of the heel compared to insertional Achilles tendinitis, which tends to be located more toward the bottom of the tendon’s attachment point. Tight shoes that press against the back of the heel are a frequent trigger, and the two conditions can occur together.
Stress Fractures of the Heel Bone
A calcaneal stress fracture develops gradually from repetitive impact. Unlike a sudden break, you may first notice a vague twinge in your heel that slowly becomes more noticeable over days or weeks. The pain gets worse whenever you put weight on your heel, such as standing for a long time, and it eases when you rest. Your heel may feel tender or warm to the touch, and bruising can appear.
Stress fractures are more common in runners, military recruits, and anyone who has recently increased their activity level. They don’t always show up on standard X-rays early on, so an MRI is often needed to confirm the diagnosis. The key difference from plantar fasciitis is that stress fracture pain tends to worsen steadily with any weight-bearing activity rather than improving after a few minutes of walking.
Fat Pad Atrophy
Your heel has a specialized cushion of fatty tissue that absorbs shock with every step. When this fat pad thins out or breaks down, you lose that natural protection, and walking on hard surfaces starts to feel like stepping directly on bone. The resulting pain is deep, right in the center of your heel, and feels more like a deep bruise than the arch-pulling ache of plantar fasciitis.
Fat pad atrophy worsens predictably: hard surfaces hurt more than soft ones, barefoot walking on tile or concrete is particularly painful, and high-impact activities like running or jumping intensify it. The condition progresses over time. Pain that initially only appears during activity eventually shows up even at rest. Age is the primary risk factor, as the fat pad naturally thins with time. Higher body weight, a family history, and previous trauma to the heel also contribute.
Nerve Entrapment
When a nerve running through or near the ankle becomes compressed, the resulting pain feels distinctly different from a muscle or bone problem. Tarsal tunnel syndrome occurs when the nerve passing through a narrow channel on the inside of the ankle gets pinched. It causes burning, tingling, numbness, or “pins and needles” sensations on the bottom of the foot or along the inner ankle. Some people also notice weakness in the small muscles of the foot.
Another nerve-related cause, sometimes called Baxter’s nerve entrapment, involves a small branch that runs along the bottom of the heel. The burning, electric quality of nerve pain is the distinguishing feature. If your heel pain comes with tingling or numbness rather than a straightforward ache, a nerve issue is worth investigating.
Heel Pain in Children
In kids between ages 8 and 14, the most common cause of heel pain is Sever’s disease, an inflammation of the growth plate at the back of the heel bone. It’s extremely common during growth spurts. Children’s bones are still forming at the ends, and the new bone is made of cartilage that’s softer and easier to injure than mature bone. Repetitive stress from running and jumping, especially on hard surfaces, irritates this vulnerable area. A tight Achilles tendon makes it worse by pulling on the heel bone with every step.
Sever’s disease isn’t dangerous and resolves on its own once the growth plate matures, but it can be quite painful in the meantime and often sidelines active kids from sports temporarily.
Systemic Diseases That Cause Heel Pain
Occasionally, heel pain signals something happening beyond the foot itself. Inflammatory conditions like gout, rheumatoid arthritis, ankylosing spondylitis, and reactive arthritis can all produce heel pain. These systemic causes are less common than local problems like plantar fasciitis, but they’re worth considering if heel pain appears in both feet simultaneously, comes with joint pain elsewhere in the body, or doesn’t respond to typical treatments. Heel pain from a systemic condition generally improves when the underlying disease is treated rather than when the foot alone is addressed.
How to Tell the Difference
Location is the most useful clue. Pain on the bottom of the heel, worst with first morning steps, points to plantar fasciitis. Pain in the center of the heel that feels like a deep bruise, especially on hard surfaces, suggests fat pad atrophy. Pain at the back of the heel implicates the Achilles tendon or the bursa behind it. Pain that worsens steadily with any weight-bearing and doesn’t improve with walking raises concern for a stress fracture.
The quality of pain matters too. A burning or tingling sensation suggests nerve involvement. A deep ache that builds over weeks is typical of overuse injuries. Sharp pain that appeared after a specific incident could indicate a more acute injury. And if the pain is accompanied by swelling, warmth, and joint symptoms elsewhere, a systemic inflammatory condition becomes more likely.