A twenty-year-old, intelligent hebephrenic 'recovered' after a course of insulin treatment without having gained any understanding of her emotional conflicts and still unable to emancipate herself from her parents and to develop a satisfactory heterosexual relationship. Two months after the termination of the insulin treatment she made a suicidal attempt. She was then placed on ambulatory insulin treatment. During this time an interesting reaction occurred: first she wrote down her thoughts during the period of hypoglycemia, then after a few weeks she started verbalizing her problems and after six weeks she talked freely at any time of the day. After four months of ambulatory insulin treatment, combined with psychotherapy and social case work, she developed considerable insight and started to handle practical matters by herself in a satisfactory manner. The patient's 'aggressive, oversolicitous mother' was treated simultaneously. The work of the psychiatrist and the social worker—whose 'understanding and orientation was based on the psychoanalytic theory of human motivation'—was closely coördinated.