Many kidney diseases are “invisible killers”, in order to early detection and treatment, please consult the nephrology department as soon as possible if the following conditions occur: 1, edema: kidney disease edema is characterized by morning eyelid or facial edema, severe edema can appear in the low hanging parts of the body, such as the inner side of the ankles, both lower limbs, lumbosacral region, etc.. 2. Hypertension: Most kidney diseases can cause hypertension, which can lead to headache, dizziness, blurred eyes, tinnitus and other symptoms in severe cases. In addition, long-term hypertension can also cause kidney damage, manifested as edema, proteinuria, renal insufficiency, etc. 3.Lower back pain: soreness and discomfort in the kidney area, colic or persistent dull pain, is one of the manifestations of urinary stones and kidney disease. 4.Urinary frequency, urinary urgency, urinary pain: it is a typical symptom of urinary tract infection. 5, too much or too little urine volume: normal human urine volume is 1000-2000ml/day. Whether the urine volume increases or decreases, it may be a manifestation of kidney disease, especially polyuria at night is often a signal of kidney disease. 6, hematuria or proteinuria:If you find red urine or increased foam in urine, it is often caused by hematuria or proteinuria, which is an important sign of many kidney diseases. 7, weakness, nausea, pallor: the above symptoms are often one of the important manifestations of uremia. 8, diabetes:Diabetic nephropathy is one of the most serious complications of diabetes. From the onset of diabetes, the damage to the kidneys begins. Therefore, once diabetes is diagnosed, you should see a nephrologist at the same time.