Foaming in the urine may be due to proteinuria, or it may be due to other causes. If the protein content in the urine is increased, there can be an increase in the amount of foam during urination, but a urinalysis is needed to confirm the presence of proteinuria. Other reasons include: 1, increased sugar content in the urine, in the process of urination can also appear to have increased urine foam. 2, when there is a bacterial infection in the urine, there can also be more bacteria and their bacterial metabolites, the presence of some bacterial micro-protein, can be in the process of urination can also appear to have increased foam. 3, if the ketone bodies in the urine, bilirubin level increases, the There can also be an increase in the number of bubbles during urination. At the same time, it can be accompanied by a yellowish color of urine or an abnormal change in the smell of urine.4. Prolonged holding back of urine or drinking less water caused by the concentration of urine, which in the process of urination can also be caused by the increase in the foam of urine. So the increased foam in the urine may be proteinuria, but it may also be due to other reasons. It is recommended to go to the hospital for examination to further clarify.