Can intercourse cause an increase in microscopic hematuria the following day? hx of interstitial cystitis. have trace to small in urine most of time except 1st morning urines are normally negative. today have small to moderate. no wbcs or nitrate?

Sterile pyuria (leukocyturia) is typical for interstitial cystitis not lone hematuria. The urine dipstick is positive for occult blood does not always mean true hematuria. I am curious why your partner has checked urine so often.

In certain sexual positions the bladder can get mildly traumatized and can cause micro hematuria. suggest empty your bladder after sex and drink a fair amt. of water and keep a regular (yearly?) follow up with your Urologist due to h/o inter. cystitis. Good luck