The most common reason your foot arch hurts after running is plantar fasciitis, an overuse injury where the thick band of tissue along the bottom of your foot becomes irritated at its attachment point near the heel. But it’s not the only possibility. Several conditions cause arch pain in runners, and the specific location, timing, and quality of your pain can help narrow down what’s going on.
Plantar Fasciitis: The Most Likely Cause
The plantar fascia is a tough strip of connective tissue that runs from your heel bone to the base of your toes. It works like a bowstring, holding up your arch and preventing it from collapsing every time your foot hits the ground. During running, this tissue absorbs enormous repetitive tension, and when that tension exceeds what the tissue can handle, small-scale damage and inflammation develop at the point where the fascia attaches to the heel bone.
The hallmark symptom is sharp pain in the arch or underside of the heel, especially with your first steps in the morning or after sitting for a while. Runners often notice it most in the first few minutes of a run, then again after they stop. The pain tends to build gradually over days or weeks rather than appearing suddenly.
A one-year prospective study of over 1,200 participants found a total plantar fasciitis incidence of 2.3%, with runners logging more than 40 kilometers (about 25 miles) per week facing six times higher odds of developing it compared to those running 6 to 20 kilometers weekly. That weekly mileage threshold is worth paying attention to if you’ve recently ramped up your training.
How Your Foot Type Plays a Role
Both flat feet and high arches can lead to arch pain, but for different biomechanical reasons. If you have low arches or flat feet, your foot tends to roll inward excessively during each stride (overpronation). That extra inward motion stretches and elongates the plantar fascia beyond its normal range, creating strain along the arch and at the heel attachment. Over hundreds or thousands of steps per run, that added stretch accumulates into real tissue stress.
High arches create the opposite problem. A rigid, high-arched foot doesn’t flex enough to absorb ground impact effectively. Instead of spreading the force of each footstrike across the whole foot, a high arch concentrates load onto the plantar fascia like pulling on a tight bowstring. The result is the same: excessive tension on the arch, just from a lack of motion rather than too much of it.
Your shoe choice should reflect this. Runners who overpronate generally benefit from shoes with structured medial support that limits inward rolling. Runners with high, rigid arches typically do better in shoes with extra cushioning to compensate for the shock absorption their foot can’t provide on its own. If you’ve been running in the wrong category of shoe for your foot type, that mismatch alone can explain your arch pain.
Posterior Tibial Tendon Problems
If your pain is concentrated along the inner side of your ankle and arch rather than the bottom of your foot, the issue may be your posterior tibial tendon. This tendon runs behind the bony bump on the inside of your ankle and plays a major role in supporting the arch from above. When it becomes inflamed or weakened, you’ll notice pain and sometimes swelling along the inner ankle that gets worse with activity.
A useful self-check: try standing on one leg and rising onto your toes. If that’s painful, difficult, or impossible on the affected side, posterior tibial tendon dysfunction is a strong possibility. Over time, this condition can cause the arch to progressively flatten and the heel to shift outward. Catching it early matters because it’s much easier to manage before structural changes set in.
Stress Fractures: The Red Flag
A navicular stress fracture is less common but more serious. The navicular is a small bone at the top of your arch, and runners who increase mileage or intensity too quickly can develop a hairline crack in it. The pain is typically a deep ache across the top or middle of the foot that improves with rest but returns reliably when you start running again.
What distinguishes a stress fracture from soft tissue injuries is its persistence. Plantar fasciitis pain often loosens up during a run, while stress fracture pain tends to worsen the longer you’re on your feet. If pressing firmly on the top of your midfoot reproduces your pain, that’s worth getting evaluated with imaging. Stress fractures don’t heal well if you keep running through them.
Strengthening Your Arch
The small muscles inside your foot (intrinsic muscles) control pronation, support the arch, and help create a stiff lever for push-off. In many runners, these muscles are weak relative to the demands placed on them, which shifts more load onto passive structures like the plantar fascia. Targeted strengthening can meaningfully reduce that imbalance.
The most effective exercise is the “short foot” exercise, which research has shown activates the intrinsic foot muscles more effectively than traditional towel-scrunching or marble pickups. To do it: sit with your feet flat on the floor, lift all your toes off the ground while keeping the ball of your foot planted. Notice how your arch rises. Now slowly lower your toes back down while actively contracting your arch muscles to maintain that lifted position. Think of pulling the ball of your foot toward your heel, shortening the foot without curling your toes. Hold for 30 seconds. Once this feels easy sitting, progress to standing, then to single-leg stance.
A complementary drill is toe differentiation, sometimes called the “piano toe” exercise. While keeping your toes straight, practice lifting just your big toe while the others stay down, then reverse it. This builds independent control of the muscles that stabilize the arch during the push-off phase of running, when forces on the foot peak.
Managing the Pain Now
For immediate relief, athletic taping using a technique called low-Dye taping can reduce arch pain in the short term. A randomized trial found that this taping method produced a small but significant reduction in “first-step” pain after one week by limiting how much the arch collapses under load. It works by mechanically doing what the plantar fascia is struggling to do on its own. Taping is typically used as a bridge while you address the underlying cause through strengthening or orthotic support.
Icing the arch for 15 to 20 minutes after runs, rolling your foot over a frozen water bottle, and temporarily reducing your running volume all help manage symptoms. The key word is “temporarily.” The goal isn’t to stop running permanently but to bring the load on your arch below the threshold that’s causing damage while you build the tissue’s capacity to handle more.
Returning to Full Mileage
The frustrating reality of arch injuries is that they rarely resolve in a week or two. Plantar fasciitis in particular can linger for months if you simply rest and then jump back to your previous mileage. The tissue needs progressive loading, not just rest, to rebuild its tolerance.
Start your return with shorter distances at an easy pace, paying close attention to whether pain returns during or after the run. A reasonable rule of thumb is to increase weekly mileage by no more than 10% per week once you’re pain-free. If the arch pain comes back at a particular distance, that’s your current ceiling. Hold there for a week or two before trying to push past it. Pair this gradual return with consistent arch strengthening work and appropriate footwear, and the combination addresses both the symptom and the mechanical cause behind it.