Hidden kidney pain may be related to urinary tract infection, urinary stones, renal cysts and so on. 1. Urinary tract infection: including pyelonephritis. Pyelonephritis is mostly caused by bacterial infection. According to the clinical course and symptoms, pyelonephritis can be categorized into acute and chronic, and patients may have hidden pain in the kidney, chills and high fever. 2. Urinary stones: If there are stones in the ureter, which are embedded in the local area, and hydronephrosis occurs, hidden pain in the kidney area may occur. 3. Renal cysts: renal cysts have no symptoms in the early stage, as the cysts increase in size, larger cysts protruding outwardly pulling the renal peritoneum or inwardly compressing the renal parenchyma, hidden pain in the kidneys and discomfort may occur. Patients with renal occult pain should go to the hospital in time to see a doctor, under the guidance of a professional physician to clarify the cause and timely treatment.