Soreness in the kidney area is a very common clinical presentation. The specific location of the renal region is the area where we say the ribs and the crista intersect, and it is exactly here that the kidneys are projected on the body surface. Therefore, the causes of soreness in the kidney area are mostly kidney diseases. The common causes are kidney cyst, kidney tuberculosis, kidney tumor, hydronephrosis and so on. Renal cysts are usually caused by the blockage of the collecting ducts of the kidneys, and there are simple renal cysts and multiple renal cysts. Larger renal cysts can cause pain and soreness in the renal region due to the traction on the renal peritoneum or the pressure on the surrounding tissues, as well as cause urinary tract obstruction. Renal tuberculosis is usually caused by the infection of tuberculosis bacillus in the kidneys, and after tuberculosis infection, renal tuberculosis abscess is formed, and the larger abscess pulls the renal peritoneum to cause pain in the renal region, urinary frequency, urinary urgency, and fever and other symptoms. Kidney tumor is one of the common tumors in the urinary system, there are benign tumors and malignant tumors, when the tumor is increasing, the renal peritoneum is pulled to cause soreness and pain, and oppression of the surrounding tissues, and at the same time, there will be hematuria formation. Hydronephrosis is mostly caused by obstruction of urinary tract, the obstruction of urinary tract causes the urine secreted by kidneys can not be discharged in time, resulting in hydronephrosis, and more hydronephrosis causes soreness and swelling in kidney area. The above mentioned diseases can be diagnosed through ultrasound of the urinary tract, CT of the kidneys, intravenous urography and tuberculosis test. If the symptoms of renal discomfort occur, you must not take it lightly, these urinary diseases can not be ignored, it is recommended that you can be screened by urological ultrasound to eliminate the possibility of the above diseases.