What are the early symptoms of kidney damage shown by B-ultrasound?

Early symptoms of kidney damage:

1. Changes in urine volume: When the kidneys are damaged, the glomerular filtration rate (GFR) may decrease. GFR plays a crucial role in maintaining normal urine output. A decline in filtration rate can affect urine production. At this time, patients may experience reduced urine output, with the amount of urine significantly lower than normal levels; alternatively, urine output may increase, such as abnormally increased frequency and volume of urination at night.

2. Edema: When kidney function is impaired, the glomerular filtration rate decreases, meaning that water cannot be effectively excreted from the body as it normally would. In such cases, fluid and sodium retention may occur, leading to accumulation of water and sodium ions in the body. The external manifestations typically include eyelid swelling, especially noticeable upon waking in the morning, or swelling in both lower limbs, which may show pitting upon finger pressure and recover slowly.

3. Elevated blood pressure: Due to kidney damage, water cannot be smoothly excreted from the body and thus accumulates internally, possibly leading to increased blood volume. The increased blood volume can further cause elevated blood pressure. Long-term hypertension, in turn, can worsen kidney damage, creating a vicious cycle.

4. Discomfort in the lumbar region: After kidney damage, metabolic functions may become abnormal. This can cause aching or discomfort in the lower back, which may manifest as persistent dull pain or intermittent pain. Patients may experience worsening of the discomfort after bending, prolonged sitting, or standing for long periods.