For most people, being flat footed is not bad at all. Flat feet are extremely common, and the majority of people who have them experience no pain, no limitations, and no need for treatment. That said, flat feet can sometimes contribute to foot pain, alignment issues, and injury risk, so the answer depends on whether yours are causing problems.
Why Most Flat Feet Are Harmless
The most common type of flat foot is called a flexible flat foot. If you sit down and can see an arch in your foot, but that arch disappears when you stand up, that’s what you have. Your foot is structurally normal; it just flattens under your body weight. Many people live their entire lives with flexible flat feet and never have a single symptom.
A much rarer type is a rigid flat foot, where there’s no visible arch whether you’re standing or sitting. Rigid flat feet can limit your ability to move your foot up and down or side to side, and they’re more likely to cause discomfort. But even rigid flat feet don’t automatically mean something is wrong.
Children and Flat Feet
If you’re wondering about a child, flat feet are completely normal in young kids. Babies and toddlers have a pad of fat under the arch, and the arch itself hasn’t developed yet. Flat feet typically disappear by age 6 as the foot stiffens and the arch forms. For children whose arches never develop, treatment still isn’t recommended unless the foot is stiff or painful.
Signs worth mentioning to a pediatrician include foot pain, sores or pressure areas on the inner side of the foot, a stiff foot, or limited ankle motion. Rigid flat feet that appear during the teen years are uncommon but should be evaluated, as they can be caused by bones in the foot fusing together abnormally.
When Flat Feet Do Cause Problems
Flat feet become a concern when they cause pain or change the way your body moves. When the arch collapses, your foot rolls inward (overpronation), which triggers a chain reaction up through the leg. The shin bone rotates inward, the thigh follows, the knees angle inward toward each other, and the pelvis and lower back can shift to compensate. This misalignment can reduce the ability of large muscles like the glutes and quadriceps to produce force efficiently, because the joints aren’t stacking properly and energy is lost with every step.
Over time, this pattern can overload the knee joint, contribute to shin pain, and cause tightness in the calves, hamstrings, and hip flexors. Meanwhile, muscles that would normally stabilize the foot and hip, like the glutes and the muscles along the shin, can become weak and underactive. The result isn’t always foot pain. Some people with flat feet develop knee pain, hip discomfort, or lower back issues instead.
A Tendon Problem Worth Knowing About
One complication to be aware of is damage to the tendon that runs along the inside of your ankle and supports the arch. When this tendon becomes inflamed, stretched, or torn, the arch progressively collapses and the heel shifts outward. Early symptoms include pain along the inside of the foot and ankle, swelling, and weakness when trying to rise onto your toes. As it worsens, the outer ankle bone can start getting pinched, causing pain on the outside of the ankle too.
This condition is more common in women and people over 40, with obesity, diabetes, and high blood pressure raising the risk. It’s worth paying attention to if you notice new or worsening arch pain, because early intervention is far simpler than dealing with advanced collapse.
Exercises That Can Help
Strengthening the small muscles inside the foot can improve arch function over time, though it takes consistency. The two most studied exercises are the short foot exercise (where you try to shorten your foot by pulling the ball of the foot toward the heel without curling the toes) and the towel curl (gripping a towel with your toes). Both are typically performed with 5-second holds, progressing from sitting to standing as you get stronger, then to single-leg standing.
Research shows these exercises don’t produce much change in the first four weeks, but by eight weeks, people see measurable improvements in arch mobility and dynamic balance. These aren’t dramatic transformations, and the evidence quality is still limited, but for something you can do at home with no equipment, the risk-to-benefit ratio is excellent.
Shoes and Orthotics
If flat feet are causing you discomfort, footwear is the simplest first step. Shoes designed for overpronation have a stiffer midsole with built-in arch support and a reinforced heel cup to keep the foot from rolling inward. These are noticeably heavier and more structured than neutral shoes, which is the tradeoff for the added control. Non-supportive footwear like sandals or worn-out sneakers tends to make flat foot pain worse.
Orthotic insoles, whether custom-made or off-the-shelf, show consistent benefits for reducing pain. The evidence is clearer for pain relief than for actually changing foot posture long-term, but for most people, less pain is the goal anyway. Custom orthotics aren’t necessarily better than well-chosen prefabricated ones, so it’s reasonable to start with an over-the-counter option before investing in something custom.
Flat Feet and Physical Activity
Flat feet don’t disqualify you from being athletic, but they can shift your injury risk. Overpronation creates unequal weight distribution with every step, and research has linked it to injuries not just in the foot but across the body, from the ankle up to the spine. Runners with flat feet may be more prone to shin splints, knee pain, and stress-related injuries simply because of how force travels through a misaligned chain.
The practical takeaway is that if you’re active and flat footed, paying attention to footwear, building foot and hip strength, and not ignoring early pain signals matters more for you than for someone with a typical arch. Plenty of elite athletes have flat feet. The difference is in how you manage them.
When Surgery Comes Up
Surgery for flat feet is rare and considered a last resort, recommended only after all non-surgical options have been tried and symptoms remain significant. For the vast majority of people, some combination of appropriate shoes, orthotics, strengthening exercises, and activity modification is enough to manage any issues that arise. If flat feet aren’t causing you pain or limiting what you can do, there is nothing to fix.