Boys with urine foam may be the result of urine concentration, urinary tract infection, nephrotic syndrome and other reasons. 1. Concentrated urine: If you don’t like to drink water or hold your urine for a long time, it mainly manifests itself in the morning when you wake up and urinate for the first time or the first few times you urinate with foam, and other times when you urinate with less foam or no foam, accompanied by yellow urine color. 2. Urinary tract infection: as bacteria and viruses invade the urinary system and continue to reproduce, the composition of the urine changes, and the phenomenon of increased foaming occurs during urination. 3. Nephrotic syndrome: proteinuria caused by nephrotic syndrome and other diseases can lead to increased urine foam. When the phenomenon of foam appears in the boy’s urine, parents should take their children to the hospital in a timely manner, under the guidance of the doctor’s treatment.