Flatfoot

Flatfoot is a condition in which the arch of the foot is lower than normal or makes full contact with the ground, altering how load is distributed through the foot and up through the leg.

What flat feet mean for your feet and the rest of your body

Everyone is born with flat feet, and most people develop arches during childhood. For some, the arch remains low or collapses over time — a condition that can be structural from the start or develop gradually from factors like weight, muscle weakness, or injury to the tendons that support the arch. A flatfoot affects more than just the foot. When the arch collapses inward, it changes the angle of the ankle, which in turn influences the alignment of the knee, hip, and lower back during walking and standing. Over time, these altered mechanics can contribute to plantar fasciitis, arch tendon problems (posterior tibial tendon dysfunction), knee pain, and hip discomfort — all of which trace back to how your foot is loading the ground.

Why flatfoot pain is often attributed to the wrong place

It's common for people with flatfoot to be treated for knee or hip pain without anyone looking at what's happening at the foot. Orthotics can help redistribute load, but they work best alongside strengthening the muscles that support the arch and correcting the movement patterns that allow the collapse to happen in the first place.

Why arch support alone isn't always enough

Insoles and supportive footwear reduce stress on the foot but don't strengthen the muscles responsible for maintaining the arch under load. Without that muscle work, the foot continues to rely entirely on passive support — which means the underlying problem persists. A physical therapist can identify which muscles need strengthening and how your movement patterns need to change to support lasting improvement.

How Sword Health can help

A physical therapist can assess your foot mechanics, identify how flatfoot is affecting your movement up the chain, and build a targeted program to address both. Sword makes that level of care available from home, so you can start working on the root cause rather than just managing symptoms.