L just finished urinating and about four drops of blood come out just after the urine what might be wrong with me? l'am almost fourty years old and

Causes of hematuria: Hematuria can be caused by any bleeding in the urinary tract. It could be caused by a tumor of the kidney, kidney stones in the ureters or by a bladder tumor, among other things. Have your urine cultured and if you have hematuria with no uti, see a urologist for evaluation . If you do have a uti, have your urine analyzed after the infection, to make sure it resolves. If not, see a urologist.