What is the cause of kidney swelling and back pain?

Some people always feel bloated and painful in their kidneys and waist. In this case, it is a manifestation of kidney deficiency and requires timely targeted treatment. Patients with kidney deficiency should participate in physical exercise appropriately and avoid overly strenuous exercise. Let the body gradually adapt to the state of exercise, which will help alleviate the disease. They should also pay attention to a light diet. So, what is kidney and lower back pain?

1. Causes

Common pathogens: The most common pathogen causing kidney pain is Staphylococcus aureus. Bacteria can enter the kidneys through the blood from purulent lesions in other parts of the body, such as boils, sores, abscesses, infected wounds, upper respiratory tract infections, and infections of tissues adjacent to the kidney. In the early stage, the lesions are limited to the renal cortex to form multiple tiny abscesses, which may then aggregate into multi-chamber abscesses. In some patients, small abscesses may merge into large abscesses and become renal pain. In a few patients, in the late stage, the renal pain near the cortex may break through the capsule and develop into perinephric abscesses. The abscesses near the renal calyx may perforate and drain into the renal pelvis, and bacteria may be found in the urine.

Other reasons such as cysts and stones can also cause kidney pain. Usually ureteral stones can cause severe pain. Renal cysts and various types of nephritis can also cause kidney pain due to damage to the renal interstitium. After sitting for a long time or walking for a long time, you may feel soreness and swelling in the kidneys.

2. Diagnosis

Kidney pain may have no symptoms in the early stages, and the primary infection may have healed and been ignored. In the later stages, renal pain occurs suddenly and is accompanied by chills, high fever, loss of appetite and other manifestations of bacteremia or toxemia. Renal pain, tenderness, and percussion tenderness may occur on the affected side. Sometimes, low back pain affects leg movements, and the swollen kidney can be felt, and the waist muscles are tense.

Regarding the diagnosis of kidney pain, there is a history of infectious foci, such as upper respiratory tract infection, furuncle, abscess, wound, etc. High fever, chills, symptoms of bacteremia, low back pain, lumbar tenderness, percussion pain, and swollen kidneys can be felt. The diagnosis can be made with the help of blood urine test, B-type ultrasound and CT scan. At the same time, relevant auxiliary examinations can also help patients make a diagnosis, such as an increase in white blood cells, an increase in segmented nuclear cells, and a positive blood bacterial culture; there may be pus cells in the urine, bacterial growth in urine culture, and bacteria can be found in urine sediment smear staining; abdominal X-rays show enlarged affected kidneys and blurred renal shadows; intravenous urography shows that the renal calyces in the lesion area are compressed and deformed; B-ultrasound shows irregular abscess contours, and the abscess is a low-echo area; CT renal scans show round bloodless areas, and the CT value is between cysts and tumors.