Q: I recently peed in the morning and often found a lot of “small bubbles” in the urine, is this phenomenon normal?　　Dr. Wang Bin of Dongzhimen Hospital’s male department: If you wake up for the first time in the morning and find a layer of tiny bubbles floating on the surface of your urine, and they don’t dissipate for a long time, this may be an early symptom of nephritis. The earliest symptom of nephritis is the appearance of protein in the urine, and this “small bubble” is caused by more protein in the urine. If you don’t treat nephritis actively in the early stage, you are likely to develop kidney insufficiency and other problems. If the “small bubbles” are in sheets and foamy, you should have your blood sugar checked to rule out diabetes. If you are a man, you may also be suffering from prostatitis, and the urine of a person with prostatitis may carry prostate fluid, so there will be oil beads on the surface of the urine, which will also show the state of “small bubbles”.