Early symptoms of kidney cancer are usually atypical and may include occasional back discomfort and intermittent painless hematuria of the naked eye. Kidney cancer is usually the more common tumor in urology. It grows in the parenchyma of the kidney and usually has no obvious symptoms in the early stage. Some patients may have occasional symptoms such as low back pain, but most of them can be relieved on their own, and patients may not pay attention to the condition and delay treatment. With the gradual enlargement of the tumor, most patients may show three typical symptoms, lumbar pain, palpable mass in the lumbar region and painless hematuria. If patients have lumbar discomfort or unexplained hematuria, it is recommended to consult a doctor in time. Once the tumor is detected, patients need to undergo standardized treatment as soon as possible.