1. Behavioral characteristics harmful to health: Some behaviors will be harmful to human health, such as smoking, drinking, taking drugs, unreasonable eating habits, etc., which will lead to health damage, such as lung cancer, liver disease and heart disease.
2. High-risk: Some behaviors harmful to health are high-risk, such as smoking, excessive drinking, excessive irritating food, irrational drug use, etc. This will be harmful to human health and may even lead to death.
3. Long-term effects: Some behaviors harmful to health have long-term effects, such as smoking and drinking, which will not only affect short-term health, but also affect long-term health and even lead to chronic diseases.
4. Strong transmission: Some behaviors harmful to health are contagious, such as smoking and drinking, which will have an impact on people around, such as the harm of second-hand smoke to babies and children.
5. Uncontrollable: Some behaviors harmful to health are uncontrollable, such as smoking and drinking. They will not only affect the health of individuals, but also the health of others, and even cause unexpected losses.