Heel Pain After Running? Plantar Fasciitis Explained

If the first few steps out of bed bring a sharp or aching pain under your heel, you may be dealing with plantar fasciitis. MedlinePlus calls it one of the most common orthopedic foot complaints, and its list of risk factors includes running long distances. MedlinePlus (reviewed June 2026) says treatment starts with rest, stretching and supportive shoes, and that most people feel better within 6 to 18 months. This is general information; a provider should confirm the diagnosis.

1. What it is

The plantar fascia is the thick band of tissue on the bottom of your foot. MedlinePlus explains that it connects the heel bone to the toes and creates the arch of the foot. When this tissue becomes swollen or inflamed, the condition is called plantar fasciitis. Its common name, according to MedlinePlus, is jogger's heel.

The swelling happens when the fascia is overstretched or overused.

2. Why runners get it

MedlinePlus lists the factors that make plantar fasciitis more likely. Several are directly about running:

• Running long distances, downhill, or on uneven surfaces
• Changing your activity level
• Shoes with poor arch support or soft soles
• A tight Achilles tendon, the tendon that connects the calf muscles to the heel
• Foot arch problems, either flat feet or high arches
• Obesity or sudden weight gain

For a new runner, "changing your activity level" is the obvious one. A jump in weekly running puts new load on tissue that is not used to it.

3. The heel spur myth

Plantar fasciitis was long blamed on heel spurs. MedlinePlus says research has found this is not the case: on x-rays, heel spurs show up in people both with and without plantar fasciitis. So a spur on an x-ray does not explain the pain, and the absence of one does not rule it out.

4. What it feels like

MedlinePlus describes the most common symptom as pain and stiffness in the bottom of the heel. The pain can be dull or sharp, and the bottom of the foot may ache or burn. It is often worse:

• In the morning with your first steps
• After standing or sitting for a while
• When climbing stairs
• After intense activity
• During walking, running, and jumping

It can build slowly or come on suddenly after a hard session.

5. What helps

MedlinePlus says providers often recommend these steps first:

• Acetaminophen or ibuprofen to reduce pain and inflammation
• Physical therapy focused on heel and foot stretching
• Night splints that stretch the foot while you sleep
• Resting as much as possible for at least a week
• Supportive, cushioned shoes

You can also ice the painful area at least twice a day for 10 to 15 minutes, more often in the first couple of days.

If those steps do not work, a provider may suggest a boot cast for 3 to 6 weeks, custom orthotics, or steroid injections. Surgery is sometimes needed but is rare.

NIAMS's general advice for exercise injuries fits here too: minor injuries can often be treated at home at first, but if pain or other symptoms persist or get worse, check with a health care provider. And once an injury heals, NIAMS stresses continuing some form of regular exercise, choosing activities suited to your fitness level and increasing intensity gradually.

6. How long it takes

This is the part runners least want to hear. MedlinePlus says nonsurgical treatment almost always improves the pain, but treatment can last from several months to 2 years, and most people feel better within 6 to 18 months. Patience and consistency with stretching matter more than any quick fix.

7. Prevention for runners

MedlinePlus's prevention advice is short:

• Keep your ankle, Achilles tendon, and calf muscles flexible.
• Stretch the plantar fascia in the morning before you get out of bed.
• Do activities in moderation.

Pulling those together with the risk factors above, a runner's prevention list might look like this:

• Build weekly mileage gradually rather than in jumps.
• Limit long downhill runs and very uneven trails early on.
• Choose shoes with good arch support and cushioning.
• Add calf and Achilles stretches to your cool-down.

8. When to contact a provider

MedlinePlus says to contact your provider if you have symptoms of plantar fasciitis. A provider will examine your foot for tenderness along the sole, flat feet or high arches, swelling, and tightness in the arch, Achilles tendon, or calves, and may order x-rays to check for other problems.

9. Key takeaways

• Plantar fasciitis is inflammation of the thick tissue under the foot that links the heel to the toes.
• Long, downhill, or uneven running, a sudden change in activity, poor shoes, and tight calves raise the risk.
• Heel spurs are not the cause; they appear in people with and without the condition.
• Treatment starts with rest, stretching, supportive shoes, ice, and pain relievers.
• Most people feel better within 6 to 18 months, so recovery takes patience.