If kidney stones cause obvious urinary tract infection, or long-term kidney stones cause kidney lesions and proteinuria, there will be foam in urine that does not disappear, so further examination including urinary routine, urine culture, 24-hour urine protein quantification, urine osmolality, urine microprotein and other tests are needed to clarify the diagnosis. If the urinary tract infection is caused by kidney stones, you can choose anti-inflammatory drugs, such as Sanjin tablets, Hot Lin Qing capsule, Bazheng capsule, and continue treatment for 2-4 weeks to control the inflammation and then the foam in the urine will disappear slowly. If the increase in urine foam is caused by proteinuria, you can choose drugs such as Prednisone tablets, Jin Shui Bao capsule, Bai Ling capsule and so on for 3-6 months of continuous oral treatment to control the kidney lesions after the disappearance of urine protein will also slowly reduce the foam of urine.