Hi, dear I have gone through your question. I can understand your concern. You have some black particles in urine. You may have some urinary tract infection or some stone or mass in kidney. You should go for urine routine and microscopic examination as well as ultrasound abdomen. It will give you exact diagnosis. Then you should take treatment accordingly. Levofloxacin or norfloxacin can be helpful in urinary tract infection. Moreover you should also check your blood sugar level to rule out diabetes. Because it is most common cause of urinary tract infection. Consult your doctor and take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using health care magic. Wish you a very good health.