Most kidney cancer patients do not have any obvious symptoms in the early stage, neither pain nor mental discomfort, so it is easy to be ignored. However, in the advanced stage of kidney cancer, the symptoms will be more obvious, such as hematuria, severe back pain, abdominal mass, rapid weight loss, unexplained fever and a series of other symptoms. In the late stage of kidney cancer, because the tumor invades and compresses the connective tissue, muscle, lumbar vertebrae or lumbar nerve of the posterior abdominal wall, it will cause persistent pain in the patient’s lower back, which is usually dull pain and lasts for a very long time, making the patient suffer. As the tumor gradually grows outward, it will break through the perinephric membrane and invade the perinephric fascia and adjacent organs and tissues of kidney, such as adrenal gland, colon, peritoneum, liver and spleen, etc. It will cause abdominal distension and pain, diarrhea, ascites, aversion to oil, constipation and bloody stool. Wasting is a common systemic symptom of kidney cancer patients, accompanied by general discomfort, loss of appetite, poor mental health and other symptoms. It is also accompanied by unexplained fever or metastasis when it is first detected, lung symptoms such as weakness, anemia, cough and blood spitting. If kidney cancer patients have the above symptoms, it means that they have reached the advanced stage of kidney cancer. Patients with advanced kidney cancer are in pain, so they should be given good mental comfort and nutrition supply.