The early clinical manifestations of nephritis: 1, swelling: in daily life suddenly found facial edema or eyelid edema, some patients will appear double lower limb edema, should promptly go to the hospital to check the urinary routine, to see if there is protein in the urine; 2, increased foam in the urine: not all of the increased foam in the urine is protein urine, if found in the urine foam increased, like the bubbles of washing powder, can not be dispersed when If you find an increase in urine foam, like the bubbles of laundry detergent, and it doesn’t go away, you should go to the hospital for a routine urine examination to see if there is protein in the urine; 3. Color change of urine: When you find a change in the color of urine, especially if the color of urine becomes darker, or if there is urine like meat wash, you should go to the hospital for further examination to see if there is hematuria. Some patients may experience weakness, increased nocturnal urination, and sudden hypertension, and this is also the time when you should go to the hospital for further examination. When edema of both lower extremities, increased foam in urine, change in urine color, increased frequency of nocturia, sudden weakness, and increased blood pressure are found, you should go to a kidney specialist for examination to determine if nephritis exists.