High foam in urine is not necessarily a sign of abnormal kidney function or kidney failure. At this time, there may be normal urine routine and normal kidney function when you go for urine routine check. When there is an increase in foam in the urine without infection, abnormal kidney function, proteinuria, etc., then there may be too much solute component in the urine. If the urine is in a concentrated state, it may show more foam due to the effect of shock during the discharge of urine. When the urine contains an increase in abnormal ions, such as an increase in sodium ions and calcium ions, then it can also show an increase in foam. When there is a crystalline state in the urine, such as high uric acid levels, it can also lead to crystalluria and increased urine foam. When small stones are mixed in the urine, increased foam in the urine can also occur, which requires further examination to identify, not necessarily due to kidney problems or urinary tract problems.