For about a year and a half i have had diarrhea and constipation back and forth. i have abdominal pain on my lower left side frequently. and the last month there has been black spots in my stool. i also feel very tired most of the time but have trouble s

? IBS: The symptoms you're describing may be consistent with your irritable bowel syndrome, although other problems could be present also. Because of the black stool, you need to be tested to be sure there is no internal bleeding. In the meantime, you should increase the fiber in your diet and consider a fiber supplement. See your doctor or a gastroenterologist for this work up and treatment. Good luck.