The kidney is a silent organ, but it is responsible for important functions of the body. The health of kidneys directly affects the metabolic and excretory functions of the body. The following are the signs of kidney diseases in daily life, do you know them? Edema If you find edema in your eyelids, face, calves, ankles, etc., especially if the skin does not bounce back quickly to its original state after pressure, excluding diseases caused by the heart and liver, it suggests that the kidneys may have difficulties in eliminating excess water. Abnormal urination Under normal circumstances, the average number of times an adult urinates is 4 to 6 times a day, and the volume of urine is 1500 to 2000 ml. If the volume and frequency of urine changes, you should suspect whether there is an abnormality in the urinary system. If the urine bubbles up like soap and water, and the bubbles do not go away even after a period of time, this indicates the presence of proteinuria and requires immediate examination for kidney disease. Lack of energy When the kidney function decreases, a feeling of lethargy may occur due to the restricted elimination of metabolic waste from the body. There is no particular reason for this, but when there is a persistent feeling of lethargy, you need to be alert for the presence of hyperalgesia. Loss of appetite Loss of appetite is also a common symptom of kidney disease, and sometimes nausea and vomiting are also present. At this point, if gastrointestinal disorders are ruled out, you should receive a kidney examination. Low back pain Low back pain and back pain are often signs of kidney disease. If severe low back pain is present, it may be caused by renal pelvic stones or ureteral stones; if you simply feel discomfort, vague pain, or back pain in your lower back, you also need to be examined for kidney disease after excluding the cause of skeletal muscle.