The culture treason theory (CTT) is a cultural and behavior changes theory that explains all negative conscious and unconscious barriers, resistance, frustrations, moral pains felt by the person when he/she might adopt new culture (in a broad sense) or behavior. The conflict of new and existing behavior (in a narrow sense) in the mind of the person creates doubt and confusion. This theory development used the grounded theory process through ontological constructionism and epistemological interpretivism. The right appraisal of the CTT determines reasons for barriers, health-related issues' root causes, and the right strategies to use. Hence, it can help to predict the behavior adoption time.