Pes Planus (Flat Foot) disorder has been found to be associated with frequent knee pain and medial tibiofemoral (TF) cartilage damage. The flattening of the foot causes this pain and damage within the knee by forcing the tibia to rotate internally increasing the rotational pressure on the TF joint. We will be discussing a few factors that may contribute to pes planus such as equines foot deformity, tibial torsion, tarsal coalition, ligamentous laxity and congenital vertical talus. Amongst some of these contributions, a reduction in physical activity at a young age can also be a root cause to flat feet and genu valgum (knock-knees). We also observed the types of rehabilitation techniques for improving pes planus. In order to control muscle skeletal discomfort, pain, and correct biomechanical processes, rehabilitation focuses on the muscles responsible for plantar flexion, dorsiflexion, pronation, and supination of the ankle. Controlling the lateral longitudinal arch stability of the ankle has also proven to be a reliable method of improving a flat foot. With the use of personalized orthotics and short foot exercises, improvements have been shown to be reached. These exercises are designed to strengthen and support the cross-sectional area of the foot containing the flexor halluces and abductor halluces muscles. Because pes planus is a problem in younger patients, it’s crucial to recognize the condition early and improve postural mechanics so arthritis and other joint damages can be prevented as the patient ages