Kidney function evaluation indexes include blood creatinine, urea nitrogen, etc. Foamy urine with normal kidney function may be a normal physiological phenomenon, or it may be caused by urinary tract infection or prostatitis. In addition, some kidney disease patients with normal kidney function may also appear foamy urine. 1. Physiological phenomenon: the formation of foam in urine is due to the tension on the surface of the liquid, the higher the tension the more foam is formed. Foamy urine may appear if the urination position is high or urination is urgent and the urine is strongly impacted, this kind of situation does not need to be treated. 2. Urinary tract infection: For urinary tract infection caused by foamy urine, check the kidney function is normal, you can apply antibiotic drugs under the guidance of a professional doctor, such as levofloxacin tablets, amoxicillin capsules and so on. 3. Prostatitis: for prostatitis caused by foamy urine, kidney function is normal, you can take medication according to the doctor’s instructions, such as oral cefaclor, prostate Shutong capsule, compound Sanguin tablets, etc., but also can choose the rectal administration of drugs, such as prostate suppositories. 4. Some kidney diseases such as membranous nephropathy patients due to a large amount of protein loss from the urine, may also appear foamy urine, such patients may also have normal renal function. The examination found that the kidney function is normal urine foam, it is recommended to timely to the hospital to identify the cause, under the guidance of a professional doctor standardized medication. During the treatment period, you should also maintain a light diet, do not eat spicy, stimulating food, do not sit for a long time, hold urine, etc., which will help the recovery of the condition.