Long incubation period: the influence of bad behavior and lifestyle takes a long time to have obvious adverse effects on health. Bad behaviors such as smoking, unhealthy eating habits and lack of physical exercise will take years or even decades to cause health problems.
2. Poor specificity: There is no clear one-to-one correspondence between unhealthy lifestyles and diseases. A bad behavior is related to a variety of health problems, and a disease is also related to a variety of bad behaviors. Smoking is not only related to lung cancer, but also to cardiovascular diseases, respiratory diseases and many other health problems.
3. Strong synergy: When a variety of bad behaviors exist, their influence is not a simple additive relationship, but a synergistic effect that promotes each other. It means that when a variety of bad behaviors coexist, the impact on health will be more serious than when each behavior exists alone. People who smoke, have an unhealthy diet and lack physical exercise have higher health risks than those who only have one of them.