Foaming in urine is possibly caused by increased protein or sugar content in urine, overly concentrated urine, and urinary tract infection. If accompanied by other uncomfortable abnormal symptoms, patients are advised to go to the hospital in time for urinalysis to clarify the cause of the disease. 1. Increased urine protein: When kidney disease or abnormal kidney function occurs, glomerular filtration is abnormal, which will lead to increased protein in urine. After urination, there will be a lot of foam that can not be dissipated for a long time, and edema can also occur. It is recommended to go to the hospital to check the urine routine 24-hour urine protein quantification, and if necessary, to do renal function tests. 2. Increased urinary glucose: It is generally recommended that diabetic patients, after urination due to the high sugar content in the urine, resulting in the emergence of foam. Typical symptoms of diabetes are “three more and one less”. It is recommended that patients go to the hospital for blood sugar testing. 3. Urine is too thick: due to the patient’s low water intake, resulting in urine can not be diluted, the high content of crystals in the urine will appear foam. It is recommended to drink more water and increase the amount of water. 4. Urinary tract infection: Urinary tract infection due to bacteria can lead to the emergence of urine foam, but also the emergence of urinary urgency, urinary pain, dysuria and other symptoms. It is recommended to go to the hospital for urine examination. Foaming urine, if accompanied by other uncomfortable abnormal symptoms, it is recommended that patients go to the hospital in time for relevant examinations to clarify the cause.