I have a back pain on left side around the waist ?

Doctor can examine: If not constipation (collection of stool in the left lower abdomen) that goes away with a bowel movement, then one's primary care doctor can check to see what the problem might be, to see if there is a mass in the abdomen or pelvis, or a kidney problem. In a middle-aged adult, even if pain goes away with a bowel movement, the doctor may want to examine him to make sure there's not something bad.