Obesity and overweight of children and young people in our country and in the world are constantly growing and represent a public health problem of the whole society. This problem needs to be addressed and tackled and a solution found because it impairs the health and quality of life of children and young people around the world. This paper will write about the very concept of obesity in preschool children, its causes and prevention, and how to try to solve the problem of obesity and provide assistance to obese children and how to try to ensure a better and healthier life. It is important to note that obesity and health problems due to it can occur in early childhood, and in the prevention and resolution of problems should be involved in time family, or parents, health care institutions and kindergartens with their educators and professional team. They should work closely, constructively and productively to reduce and prevent childhood obesity and to help if obesity is already present. A healthy and balanced diet, physical activity and a slower lifestyle are key to preventing and preventing obesity in children, and it is necessary to educate parents and children about this.