<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am having pain in my lower right abdomen. I have been taking antibiotics for 2 weeks, but the pain continues. When I drink alcoholic beverages, I develop a pain in my back. Several months ago, I had a urine sample taken for a new job, and was told that a microscopic amount of blood was found in the urine. What could be some possible causes for these symptoms? I am 55 years old, a non smoker. I have high blood pressure, which I take medication for. I am 51, and I am overweight. My stomach sometimes is distended.  <response>: Hello! Welcome to Chat Doctor. This seems to be due to a stone in urinary tract. Stone causes obstruction to urine outflow. Smooth muscles in ureter contract excessively to overcome the obstruction so is the pain. Commonest stone is Calcium-oxalate stone which has spikes on its surface. These spikes cause trauma to mucosa of the urinary tract so is the blood in urine. Many such patients are treated in my clinic to whom I advise ultrasound abdomen pelvis, X-ray PUB, renal function tests, urine routine, blood sugar level. This helps in accurate diagnosis appropriate treatment. Hope this information is useful for you. Wish you healthy life. Thanks. Regards. 