The importance of kidney to human body is self-evident, if kidney is not healthy, it will lead to metabolism disorder, which will cause many kinds of diseases. In recent years, the total incidence of renal tumor has been increasing year by year, accounting for 2% of the incidence of all tumors in the whole body, ranking 2nd in the urological tumors, and the incidence rate of urban population is higher than that of rural population. Experts pointed out that weight loss and smoking cessation can prevent kidney tumor. Weight loss and smoking cessation can reduce the incidence of kidney tumor Why is kidney tumor related to obesity? Experts introduced that although the pathogenesis of renal tumor is still unclear, some risk factors related to it have been generally recognized internationally, among which obesity is an important reason. Data show that obese men are 1.76 times more likely to develop kidney tumor than those who are not obese, and women are 2.27 times more likely to develop kidney tumor. In addition to obesity, the number one risk factor for kidney tumors is smoking, including passive smoking. Smokers are 30% to 200% more likely to develop kidney tumors than non-smokers, and the larger the amount and longer the duration of smoking, the higher the probability of developing the disease. A survey conducted by a foreign research organization once found that the incidence rate of kidney cancer in people with more than 20 years of smoking history or passive smoking history is 2.18 times higher than that in people without these conditions. In addition, there is a relationship between kidney tumors and exposure to some radioactive substances and trace elements such as lead, arsenic, cadmium, etc., special occupations such as petrochemical industry, long-term use of special drugs such as diuretics and genetic factors. People should also be cautious when taking Chinese medicines. A study in Taiwan shows that the probability of staff of some Chinese herbal pharmacies suffering from kidney tumors is higher than that of medical personnel in other positions, and the reason may be related to the long-term exposure to some Chinese medicines containing aristolochic acid components. Thirty percent of the patients were found by chance during health checkups In addition to less exposure to some risk factors that can easily cause kidney tumors, it is recommended to have regular health checkups. What is the relationship between health checkup and kidney tumor? It is understood that 20 years ago, many patients who came to the clinic had very large kidney tumors, and there was once a patient whose kidney tumor weighed as much as 4 kilograms. In recent years, the tumors found are getting smaller and smaller, this is because the awareness of health checkups began to increase year by year. 1995 to 2005, the period of health checkups or in the examination of other medical conditions, accidentally found out that they are suffering from renal tumors, accounted for about 33% of all patients with renal tumors. Kidney tumor is a solid tumor that cannot be detected by testing for tumor markers such as carcinoembryonic antigen in the blood, and the most effective method of detection is imaging tests such as ultrasound. People can add a urinary system ultrasound on the basis of physical examination package, especially in the urine routine examination of health checkup, after finding occult blood, a urinary system ultrasound should be done to exclude the possibility of kidney tumor. Hematuria and lumbar pain are already in the middle and late stage Most of the people will only realize that their kidneys may have problems after they have lumbar pain or hematuria, which is often in the middle and late stage of kidney tumor. Typical clinical manifestations of kidney cancer are called “kidney cancer triad” in medicine, i.e., hematuria, lumbar pain and abdominal lumps. Hematuria occurs early, but it is not persistent, but occurs every once in a while, and it is painless, so it is often neglected. Some patients may attribute hematuria to overwork and miss the optimal treatment period. If once the back pain occurs, or the abdominal mass appears, it means that it has entered the advanced stage of kidney tumor. Low back pain indicates that the condition has been more serious, and the abdominal mass can only be detected by patients with a thin body type, because the kidney is in the back of our belly, and it is difficult for people with an obese body type to feel it.