Kidney cancer is a kind of malignant tumor of the urinary system with a high incidence rate at this stage, which is very harmful to human health. There are many causes of kidney cancer, such as genetics, poor living and eating habits, poor living environment, smoking and drinking, high blood pressure, indiscriminate use of drugs and chemical radiation, etc., which may trigger the development of kidney cancer. In fact, there is no specific cause for kidney cancer, but rather a combination of factors. Kidney is a very important and weak organ of human body, if you do not pay attention to rest time and smoke a lot in daily life, it may lead to kidney cancer. 90% of drugs are excreted through kidneys, so indiscriminate use of drugs or hormonal drugs will do great harm to kidneys and may lead to kidney cancer in the long run. Frequent consumption of high salt, high protein and large amount of dairy products can also induce the appearance of kidney cancer. There are also some kidney cancers that run in families, which are usually determined by genetic factors and there is no good artificial method to change them. In conclusion, kidney cancer is caused by many factors. In our daily life, we should try not to smoke and use drugs indiscriminately, strengthen physical exercise and improve our body quality to minimize the chance of kidney cancer.