The simple answer is YES! flat feet can cause pain which in turn can lead to knee and back pain! On standing, the inside border of the feet should have a slight arch. This means that the small bones of our feet are correctly aligned. This is required for the small muscles to perform at optimum levels and support the body weight while walking. Flattening of this arch, puts tremendous pressure on the small muscles and bones of the feet. As a result, swelling them. This swelling in turn tightens up the muscles causing foot pain.
Ground forces are also transmitted up the legs causing other joints, namely knees, hips and back, to compensate. Thus, causing pain in these joints.
Flat arches also bend the knees on the inside. As a result there’s tremendous pressure on the inside of the knees.Eventually causing arthritis in the long run if the problem is not corrected.