We encountered a case of somatoform disorder induced by bullying, and factitious disorder was revealed during treatment. This case was a 14-year-old female, who was admitted to a pediatric ward at first. However, she was transferred to a psychiatric ward after a serious suicidal attempt. She caused many problems, and demanded that medical staff treat her symptoms. We assumed that medical care promoted regression. We performed psychotherapeutic intervention based on consensus among medical staff, similar to behavioral therapy. During the patient's admission to the psychiatric ward, her mother was compulsorily hospitalized. After separation of the mother and child, medical staff could intervene, and this stabilized the mental state of her and her mother.