Flat foot or low arches occur when there is no arch gap left between your foot and the floor, or the gap is too little. It means that your foot lies flat on the floor or almost flat.
The arch or instep on the feet develop from childhood and its possible that children might have an arch when standing due to the presence of soft tissues, but it can only be seen if a child stands on their toes.
Is It Bad to Have a Flat Foot?
It is not bad to have a flat foot, and no treatment is required if no pain is experienced. Flat feet, however, are usually associated with pain in the feet, ankles, knees, hips or even lower back. Flat feet also cause overpronation, a condition where your feet excessively roll inwards.