Type I diabetes is an autoimmune disease that also affects children. It destroys the cells that produce insulin, which is necessary to regulate blood sugar levels. Symptoms of type I diabetes in a child include weight loss, lethargy and weakness, increased thirst, frequent urination and nycturia. Treatment of type I diabetes in children involves the administration of insulin via an insulin pump or pen. An appropriate diet based on healthy eating principles, taking into account carbohydrate and protein-fat exchangers, is also important. Emotional support for the child is also crucial in this difficult disease. In addition to the diabetologist, a psychologist, a dietician and the staff of the diabetes clinic assist in the treatment.