Flat Feet and Inward Knees: What Should You Know?

When the arch lowers during standing or walking, the foot and ankle may roll inward. The shin and knee can then follow that movement, especially during stairs, running, or a single-leg squat. This is one possible contributor to patellofemoral pain syndrome, but inward knee position can also reflect hip strength, leg shape, movement habits, or footwear. Flat feet may be flexible and symptom-free, or they may be associated with arch pain, foot pain, fatigue, or pain higher in the leg.

A clinician may observe you standing, walking, rising onto your toes, and bending the knee. They may assess calf flexibility, hip control, footwear, and the tenderness pattern rather than judging the arch alone.

Use comfortable shoes with a stable, suitable fit and avoid abruptly increasing running, jumping, or hill work. Exercises may target the foot muscles, calf flexibility, hip strength, and control of the knee during functional movements. Exercise therapy or physiotherapy can help tailor this program. Custom orthotics may reduce strain for some people, particularly when symptoms persist despite footwear and exercise changes; they are not automatically needed for every flat foot. Increase activity gradually and use pain during and after exercise as a guide.

Arrange an assessment for new or worsening pain, one-sided arch collapse, swelling, repeated ankle sprains, marked walking changes, or difficulty standing on your toes. Prompt care is needed after an injury with inability to bear weight, deformity, or severe swelling. Seek urgent help for a hot, red, rapidly swollen joint with fever, or for new numbness and weakness. Persistent heel or arch pain may also need evaluation for plantar fasciitis or another cause.

Is my foot posture flexible or stiff? Is my knee pain coming from the kneecap, foot, hip, or another structure? Which exercises suit my alignment? Would orthotics add value alongside physiotherapy?