<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have pain in the left side of my stomach that goes to my lower back,it also radiates to my lower abdomen and my left leg sometimes. I also feel nausea,sudden weakness, im hardly eating what use to and im using the bathroom more than twice for num 2.I also feel an urge to do num 1, even if i just finished  <response>: Hi. Thanks for your query. From the careful evaluation of your history; I can think of an inflammatory process going on in the left lower abdomen. The causes can be an inflamed mass, lymph nodes or a mass or abscess of the deep muscles like sons or so. The best way to get a diagnosis is :-Blood tests to determine the hemoglobin, WBC count for infection, blood sugar to rule out diabetes.-Urine test: routine, microscopy, culture and sensitivity to determine whether there is an associated urinary tract infection as a basic cause or secondary to the problems I have enumerated.-Ultrasonography of the abdomen to screen for the cause and -CT scan to confirm the diagnosis. The treatment will start as antibiotics and anti-inflammatory medicines. Surgery will be needed if their as an indication for diagnosis and or therapeutic importance. 