The actual nephrological self determination, specifically the following: 1, urine foam: general nephritis performance urine trait change will have foam, and foam generally floating in the surface, the duration of relatively long is not easy to dissipate. Generally, renal edema is slightly different from that caused by the heart. Most of the renal edema will be serious in the early morning, and the edema may subside after activities. You should also pay attention to the history of cold or fever before the onset of edema, any special food or medication, any trauma, and observe the volume of urine, as sometimes nephritis may manifest itself as a decrease in the volume of urine. The main self-judgment of whether there is nephritis through the above aspects, if the above symptoms, to go to the hospital early for the necessary examination, urine foam does not necessarily mean nephritis, but if there is foam when not timely medical treatment, may miss the best time for treatment.