If you’ve got a foamy urine but your kidney function is normal, it’s likely to be caused by a chronic urinary tract infection or chronic prostatitis, not caused by a kidney lesion, and you need to check your urine routine, urine culture, prostate fluid routine, and prostate ultrasound for a clear diagnosis. If it is a chronic urinary tract infection, choose antibiotics like furantoin tablets, sulfadiazine tablets for 2-4 weeks of oral treatment, after controlling the inflammation, the foam of urine will slowly disappear. If it is clear through the examination that the increase in urine foam is due to chronic prostatitis, you can choose anti-inflammatory Chinese medicine, such as prostate Antong tablets, retention tablets, Sanjin tablets, Bazheng capsules for at least 4-8 weeks of symptomatic treatment, the foam in the urine will also slowly disappear after the prostatitis is well. You should avoid being sedentary and holding urine during the treatment period, avoid spicy and stimulating diet, and control the frequency of sexual life, not more than twice a week.