Sudden heel pain is most commonly caused by plantar fasciitis, a condition where the thick band of tissue running along the bottom of your foot becomes irritated or torn. But the location of your pain, when it started, and what it feels like can point to several different causes, some minor and others that need prompt attention. Where exactly you feel the pain is one of the best clues to what’s going on.
Pain on the Bottom of Your Heel
If the pain is under your heel, especially first thing in the morning or after sitting for a while, plantar fasciitis is the most likely culprit. The plantar fascia is a tough band of connective tissue that runs from your heel bone to your toes, supporting the arch of your foot. When it gets overused or stretched too far, it swells and becomes painful. The hallmark pattern: sharp pain with your first steps out of bed that eases up after a few minutes of walking, then returns after long periods on your feet.
Plantar fasciitis can feel sudden even though the tissue damage builds gradually. A new exercise routine, a long day of walking on hard surfaces, a switch to unsupportive shoes, or a recent weight gain can all push the fascia past its threshold. The acute phase covers roughly the first four to six weeks after symptoms appear. The good news is that 70% to 80% of people see significant improvement within 9 to 12 months with non-surgical approaches like stretching, arch support, and rest.
Another bottom-of-heel cause is a simple bone bruise. If you stepped hard on a rock, curb edge, or other sharp object, you may have bruised the fat pad underneath your heel bone. There’s often no visible bruise, but the spot feels tender when you walk and sometimes even at rest. This typically resolves on its own with time and cushioned footwear.
Fat Pad Atrophy
Your heel has a built-in shock absorber: a thick pad of fat beneath the heel bone. Over time, or after repeated impact, this padding can thin out. The resulting pain tends to sit in the center of the heel rather than toward the front where plantar fasciitis typically strikes. It gets worse when you stand or walk for long stretches, during high-impact activities like running or jumping, and especially when walking barefoot on hard floors like concrete or tile. If your heel pain appeared after increasing your activity on hard surfaces, this is worth considering.
Pain in the Back of Your Heel
Pain behind the heel, near where your shoe collar sits, usually involves the Achilles tendon or the small fluid-filled sac (bursa) next to it. Achilles tendonitis causes pain, swelling, and stiffness in the back of the heel and lower calf. It often develops after ramping up physical activity too quickly. You might notice the area feels stiff in the morning and loosens up with gentle movement.
Bursitis in the same area, called retrocalcaneal bursitis, creates a tender, bruise-like feeling behind the heel. Tight-fitting shoes and stiff heel counters are common triggers. If you recently started wearing new shoes or boots, that friction and pressure could be the source. Switching to shoes with a softer, roomier heel cup often brings relief.
Repeated irritation in this area can also lead to a visible bony bump on the back of the heel, sometimes called a “pump bump.” This develops over time from chronic inflammation rather than appearing overnight, but you may only notice it once it starts causing discomfort.
When the Pain Came With a “Pop”
If your heel pain started with a sudden pop or a sensation like someone kicked you in the back of the calf, that’s a red flag for an Achilles tendon rupture. This is a partial or complete tear of the tendon, and it’s distinctly different from a gradual ache. The pain is immediate and sharp, and you may have difficulty pointing your foot downward or pushing off to walk normally. This needs medical attention right away, as the treatment approach depends on how quickly you’re evaluated.
Pain Along the Bottom, Side, and Back
A stress fracture of the heel bone produces pain that can wrap around the entire heel rather than concentrating in one spot. Unlike plantar fasciitis, which tends to ease with a few minutes of walking, stress fracture pain gets worse the more you’re on your feet. It often starts as a mild twinge that becomes progressively more noticeable over days or weeks. Stress fractures are common in runners, military recruits, and anyone who suddenly increases their time on their feet. A standard X-ray can miss early stress fractures, so an MRI is sometimes needed for a definitive diagnosis.
Tingling, Burning, or Numbness
If your heel pain comes with burning, tingling, pins-and-needles sensations, or numbness, a nerve issue may be involved. Tarsal tunnel syndrome occurs when a nerve running along the inside of your ankle gets compressed, sending pain signals to the bottom of your foot and heel. The pain tends to worsen during or after physical activity, and in more severe cases, it can become constant. This feels noticeably different from the mechanical ache of plantar fasciitis. You might also notice weakness in the small muscles of your foot.
What Helps in the First Few Weeks
For most causes of sudden heel pain, the initial approach is similar: reduce the load on your heel and give the tissue time to recover. Icing the area for 15 to 20 minutes a few times a day can help with inflammation. Supportive shoes with good arch support and cushioning make a noticeable difference, and avoiding going barefoot on hard floors is one of the simplest changes you can make.
For plantar fasciitis specifically, taping or strapping the arch is particularly useful in the acute phase. Stretching your calf muscles and the bottom of your foot (rolling a frozen water bottle under your arch works well) helps reduce tension on the fascia. Over-the-counter arch supports or heel cups can provide immediate relief while you work on the underlying issue. Treatment works best when it’s tailored to your daily activity level and how severe your symptoms are, rather than following a rigid step-by-step protocol.
Steroid injections can provide short-term relief but tend to lose their effect after about four weeks and don’t address the root problem. They’re not recommended as a standalone treatment.
Signs That Need Prompt Attention
Most heel pain resolves with time and basic self-care, but certain symptoms warrant a same-day or next-day medical visit. Severe pain and swelling near the heel right after an injury, inability to bend your foot downward or rise onto your toes, difficulty walking normally, or heel pain accompanied by fever or numbness all require evaluation. A popping sound at the time of injury, as described above, also falls into this category. These signs can indicate a tendon rupture, fracture, or infection that needs treatment beyond rest and stretching.