There are many causes for the slight pain in the kidney area, and the examinations and tests to be done include routine urine examination, routine blood examination, abdominal plain film and abdominal ultrasound or CT, and so on. 1. Routine urine examination: Routine urine examination can determine whether the color of urine is normal, whether the urine is cloudy or whether there is hematuria, proteinuria, pyuria, tubular urine, etc., so as to clarify whether there is kidney disease. 2. Blood test: it can determine whether there is urinary tract infection, if the white blood cells are elevated, it usually suggests that there is infection. 3. Abdominal plain film: it can determine whether there are stones in the abdominal organs, and then determine whether the pain in the kidney area is caused by the stones in the urinary system. 4. Abdominal ultrasound or CT: it can show whether there are space-occupying lesions on the kidneys, and then determine whether the pain in the kidney area is caused by tumors in the urinary system. There are many causes of pain in the kidney area, and it is important to identify the causes and target treatment under the guidance of professional doctors in regular hospitals.