Background: Urinary tract obstruction is a common clinical problem. The obstruction of the urinary flow may be acute or chronic, partial or complete, unilateral or bilateral, and may occur at any site of the urinary tract. Aim: Imaging of complication of obstructive uropathy below the level of urinary bladder in adult male patient with enlarged prostate. We put urethral catheter to relief symptoms. Serum creatinine, PSA & urine analysis were within normal & the general condition was stabilized. Methods: Bedside ultrasound is used to scan the upper & lower urinary tract. We report a case of a male patient aged 50 y old, diabetic & hypertensive & complained of sudden onset of bilateral flank pain & urine retention. It is preceded by LUTS including: frequency, nocturia, dysuria & incomplete evacuation of bladder since 1 month. No previous surgical operation. No family history of renal stones.  Results: Ultrasound is a valuable diagnostic tool in obstructive uropathy. Conclusion: Scan of pre-voiding & post-voiding renal tract is very important to realize the etiology & the level of urinary tract obstruction.