No, age regression in itself is not a mental disorder. It is a behavior that may be voluntary (possibly a stress reduction technique) or involuntary (may be associated with past abuse or current mental disorders). Although it is not a disorder on its own, it might manifest from other psychological challenges.No, age regression in itself is not a mental disorder. It is a behavior that may be voluntary (possibly a stress reduction technique) or involuntary (may be associated with past abuse or current mental disorders). Although it is not a disorder on its own, it might manifest from other psychological challenges.