I have been seeing blood when i when i wipe after urination. urinalysis normal and culture neg. what can this be?

See below: The presence of blood on the tissue paper when wiping after urination usually indicative of either a urological (urethra or bladder) or gynecological (vagina or cervix) source. A normal urinalysis and negative urine culture would "tend" to rule out a urological source. Would recommend you first see a gynecologist for a good visual pelvic exam, STD screening if sexually active, and Pap smear.