The feet represent anatomical structures that are very complex in structure. It is known that they are located on the most exposed parts of the body and are exposed to numerous injuries. Many diseases are reflected precisely on the feet, and their early detection is necessary. This paper describes and defines the deformity of flat feet. Flat feet is a deformity characterized by the loss of the longitudinal arch. There are numerous causes that cause the appearance of this deformity. Overweight, genetic predispositions, weakness of the foot muscles and others are some of the factors that favor the development of the flat feet deformity. The appearance of flat feet is most often present in childhood. It is believed that the most common cause is a lack of physical activity and weakness of the muscles. Pain and swelling of the foot joint are the most common symptoms of flat feet. A proper foot examination is important. There are different ways to treat foot drop deformities. This paper describes the importance of physiotherapy processes in the treatment of the mentioned foot deformity. In prevention and treatment, emphasis is also placed on performing various exercises.