I have been noticing foamy urine for last 2 months . Urine bubbles disappears in 5 min. My renal function test reports are normal. Blood creatinine is  0.85 and eGFr score is 113 which area normal. ACR report is absolutely normal. No microalbuminuria. USG abdomen is almost normal except 4 mm renal stone in right kidney. No sign of edema or fatigue however every time I pass urine it is foamy in nature. My blood sugar level is ok.