Usually the surface tension of urine is very low, and the foam that appears in urine is of different sizes and disappears quickly, mostly for physiological reasons. If the foam in the urine is fine and does not disappear for a long time, there may be pathological causes, and you should seek medical examination to clarify the diagnosis and deal with the situation. A, physiological reasons: 1, it is possible that the position of urination is too high, or a long time to hold urine resulting in increased pressure to urinate and the performance of foam in urine, this situation does not need to be dealt with; 2, regular sexual excitement of the population, due to increased secretion of mucus from the urethral bulb gland, or men after sex, urine may be mixed with prostate fluid, will also increase the surface tension of urine, there is foam in urine, generally Pathological causes: 1, nephrotic syndrome: urine surface floating layer of fine foam and difficult to disappear, accompanied by facial edema, fatigue, weakness and other symptoms, you can follow medical advice to apply diuretics such as torasemide and glucocorticoids such as prednisone treatment; 2, glomerulonephritis: foam in the urine, can appear hematuria, accompanied by dizziness, headache, chest tightness and other symptoms, the acute phase of the choice of hormone shock, intravenous drip high dose Cystitis: bubbles can be produced due to changes in urine composition, accompanied by symptoms such as back pain, low fever and hematuria, and can be treated with sensitive antibiotics such as ciprofloxacin and cefuroxime as prescribed by the doctor, and can also be alleviated with hot compresses and warm water baths in the bladder area; 4. Diabetes: bubbles in urine can occur due to elevated urine ketone body content affecting its acidity. There are also symptoms such as polyuria, increased water consumption, lethargy and easy hunger, which can be treated with oral hypoglycemic drugs or insulin injections as prescribed by the doctor, combined with exercise and controlled diet. In addition, urinary tract infections, prostatitis, lupus nephritis, hypertensive kidney damage and other diseases can cause foam in the urine. As there are more causes, it is recommended to promptly seek medical examination for this symptom to clarify the diagnosis and then carry out targeted treatment.