Age regression is not classified as an independent mental health disorder and, therefore, there is no official diagnosis for it. But if age regression is distressing or is interfering with an individual’s daily functioning, a medical doctor or clinical psychologist can assess the situation to determine if there are any underlying medical disorders, which often include PTSD, chronic anxiety, or dissociative disorder.Age regression is not classified as an independent mental health disorder and, therefore, there is no official diagnosis for it. But if age regression is distressing or is interfering with an individual’s daily functioning, a medical doctor or clinical psychologist can assess the situation to determine if there are any underlying medical disorders, which often include PTSD, chronic anxiety, or dissociative disorder.