The question of whether betel nut is more harmful or cigarettes cannot be generalized, because betel nut and cigarettes are different in terms of the organs damaged by the body organs. Usually betel nut overdose, causing more serious damage to organs is the oral cavity and nervous system, while cigarettes on the body’s most harmful organs are the lungs and heart. So betel nut and cigarettes in the end which is more harmful can not be generalized at the same time, both have different degrees of harm to the body. For example, betel nut on the oral cavity will lead to oral deformities, oral ulcers, and in serious cases, oral cancer. However, smoking can cause significant resistance to the airway, significantly affecting the function of the respiratory tract and lungs, and in serious cases, increasing the incidence of lung cancer. In addition, betel nut can cause emotional reactions to the nervous system, such as excessive excitement or nervous system depression, and excessive smoking can cause irreversible damage to cardiovascular endothelial cells.