The main reason for the increasing number of cancers nowadays may be the increased influence of acquired cancer-causing factors such as environmental pollution factors, poor dietary habits and unhealthy lifestyles. Research has proved that there is a close correlation between the occurrence of cancer and innate factors such as hereditary factors, as well as acquired factors such as environment, diet and life. At present, there are more acquired cancer-causing factors that have adverse effects on the human body, thus leading to an increase in the occurrence of cancer. 1. Environmental pollution factors include air pollution, drinking water and soil pollution in the surrounding environment, which have long-term adverse effects on human health and induce cancer formation. 2. Bad dietary habits such as not eating on time, eating fried and pickled food, and overeating often increase the incidence of cancer. 3. Unhealthy lifestyles such as staying up late, smoking and drinking often also make cancer more and more common. Therefore, it is recommended to maintain good living habits, appropriate exercise and regular medical checkups to reduce the probability of cancer incidence.