The first thing to do is to pay attention to find the cause of the 14-year-old boy’s long-term foamy urine, and then choose the appropriate medication, surgical treatment, etc. according to the different causes of physiological factors, urinary tract infections, renal diseases, etc. 1. Physiological factors: if there is usually less water, hold urine and other bad habits lead to urine concentration, urine tension increased and so on caused by the emergence of foam when urinating, do not need special treatment, drink more water, timely urination can. 2. Urinary tract infection: if the foam is caused by Escherichia coli, Klebsiella and other infections, resulting in an increase in the cellular component of the urine, it is recommended that sensitive antibiotics such as levofloxacin and roxithromycin can be selected according to the results of the urine culture for treatment. 3. Kidney disease: If proteinuria occurs due to the presence of nephritis, nephrotic syndrome, etc., it is recommended to take glucocorticoids such as prednisone and cytotoxic drugs such as cyclophosphamide for treatment. Of course, we can’t rule out the increase of urine foam caused by stones, tumors and other diseases, and we can perform ultrasound and other examinations, take lithotripsy granules or surgical removal of stones, surgical removal of tumors and so on. Therefore, it is recommended to have further examination and choose appropriate treatment according to different causes under the guidance of doctors.