Flatfoot, medically known as 'pes planus' and commonly referred to as 'fallen arches', is a foot deformity. The human foot and ankle are complex structures composed of 26 different bones, numerous joints that hold these bones together, and dozens of muscles, tendons, and ligaments. In a normal adult foot, natural longitudinal and transverse arches (concavities) are observed when viewed from the sole. These foot arches play a critical role in evenly distributing body weight to the ground, absorbing shock during walking, and adapting to different surfaces. The strong and flexible structure of the arches is fundamental for the foot to perform its functions healthily. Flatfoot is defined as either the complete absence or a significant reduction of these natural foot arches. In this condition, the foot's weight-bearing and load-distribution mechanism is impaired; these biomechanical changes can lead to various pains and functional problems.