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What causes blood in urine post unprotected sex?

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Posted on Mon, 30 May 2016
Question: Hello,
About 15 days ago, my girlfriend got off of her period. One day later, we had unprotected sex, but it was very very brief, under one minute, as we decided it was too risky. About one week later, we had sex multiple times over the course of a weekend. On the next Monday, she began to pee blood (pinkish) throughout the course of the day, however it stopped after that day. The next couple days were symptom free until 5 days later she began feeling slight, little abdominal pain. We are scared for her health, but we don't know what to diagnose this as. Is this a simple UTI, or could it be a long stretch and be symptoms leading to pregnancy? We would appreciate an answer ASAP.
doctor
Answered by Dr. Bonnie Berger-Durnbaugh (30 minutes later)
Brief Answer:
Some information:

Detailed Answer:
Hello XXXXXXX

So I got out my calendar to figure out the timing of this.

If your girlfriend's cycles are usually 28 days long, ovulation usually happens around the middle of the cycle. The first day of the menstrual period is considered day 1 of the cycle.

If her cycle length is longer or shorter than 28 days, ovulation can usually be figured to have happened about 14 days before the first day of the menstrual period.

These are estimates - does not have to follow these rules.

The unprotected sex you had 2 weeks ago may not have caused pregnancy if you did not ejaculate. However the sex you had "one week later" may be quite risky because, I am adding the days up and that was likely mid cycle and if you ejaculated, that always creates risk.

Now about the abdominal pain, a UTI that has gone into the kidneys can produce pain in the flanks (kidney area behind the waist on the sides of the back). A bladder infection can cause some pain in the bladder area in the front.

Typical symptoms of early pregnancy are usually tender breasts and fatigue, not bleeding and abdominal pain.

The thing to do now is go in to clinic and get a pregnancy test and a urinalysis done for checking if there is a UTI. This is the only way to sort out what is going on. If you live near a Planned Parenthood or a public health clinic, you can get these done cheaply. If not, her own doctor or an urgent care clinic can do these.

A serum pregnancy test can detect pregnancy within a week of possible conception. A home pregnancy test can detect as early as first day of missed period and is most accurate 1 week after that. But I think, given that it hasn't been that long, the blood test would give you more information.

I really think you need to get both the pregnancy test and urinalysis to be able to begin to sort this out.

I hope this helps. Please let me know if I can provide further information or clarification.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Follow up: Dr. Bonnie Berger-Durnbaugh (45 minutes later)
The sex I had the week AFTER the unprotected sex was protected with condoms and birth control, and I did not ejaculate on the first time either. How does the analysis come out now?
doctor
Answered by Dr. Bonnie Berger-Durnbaugh (14 minutes later)
Brief Answer:
Pregnancy unlikely.

Detailed Answer:
If you did not get semen near her vagina, the risk of pregnancy is unlikely.

The bleeding may have been from local irritation from sex, or a UTI. The slight abdominal pain may be from UTI (although usually there is pain with urination, and urgency to go, and frequency). Or the abdominal symptoms, depending on the location, could be from abdominal cramps, or, if mid cycle and she is not on hormonal contraceptive, from ovulation (usually would be on one side or the other of the lower abdomen).

But it is sounding like the risk of pregnancy is quite low.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Follow up: Dr. Bonnie Berger-Durnbaugh (19 minutes later)
Thank you so much for all of your help! Any tips on how to treat a possible UTI and what the steps are to treat it and what to look out for?
doctor
Answered by Dr. Bonnie Berger-Durnbaugh (6 minutes later)
Brief Answer:
Treatment for uncomplicated UTI

Detailed Answer:
I want to make a correction to something I wrote above: "could be abdominal cramps" should be "could be intestinal cramps".

Yes, uncomplicated UTIs can be treated at home. It's not clear if her symptoms are from a UTI, but home remedy treatment for it shouldn't cause harm. Increase water intake to increase urination so that if there are bacteria in the bladder, they can't fester. Cranberry is a folk remedy that has some research behind it's efficacy. I usually recommend getting a cranberry juice concentrate (one that has nothing else added) and mix it with water or some unsweetened apple juice as it can be quite tart. If you can't get cranberry concentrate, she can use the Ocean Spray cranberry juice, but that has quite a bit of sugar. In your age group that usually isn't that much of an issue though.

Things to watch out for:
If it is a UTI, if she develops flank pain, nausea, or fever, these are signs of it going up into the kidney(s) and then cranberry is not enough and she shouldn't delay further - an antibiotic is necessary.

If the pain gets worse, she should be checked in person as there are other things that can cause abdominal pain, such as appendicitis (usually lower right abdomen but not always).


Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Bonnie Berger-Durnbaugh

General & Family Physician

Practicing since :1991

Answered : 3134 Questions

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What causes blood in urine post unprotected sex?

Brief Answer: Some information: Detailed Answer: Hello XXXXXXX So I got out my calendar to figure out the timing of this. If your girlfriend's cycles are usually 28 days long, ovulation usually happens around the middle of the cycle. The first day of the menstrual period is considered day 1 of the cycle. If her cycle length is longer or shorter than 28 days, ovulation can usually be figured to have happened about 14 days before the first day of the menstrual period. These are estimates - does not have to follow these rules. The unprotected sex you had 2 weeks ago may not have caused pregnancy if you did not ejaculate. However the sex you had "one week later" may be quite risky because, I am adding the days up and that was likely mid cycle and if you ejaculated, that always creates risk. Now about the abdominal pain, a UTI that has gone into the kidneys can produce pain in the flanks (kidney area behind the waist on the sides of the back). A bladder infection can cause some pain in the bladder area in the front. Typical symptoms of early pregnancy are usually tender breasts and fatigue, not bleeding and abdominal pain. The thing to do now is go in to clinic and get a pregnancy test and a urinalysis done for checking if there is a UTI. This is the only way to sort out what is going on. If you live near a Planned Parenthood or a public health clinic, you can get these done cheaply. If not, her own doctor or an urgent care clinic can do these. A serum pregnancy test can detect pregnancy within a week of possible conception. A home pregnancy test can detect as early as first day of missed period and is most accurate 1 week after that. But I think, given that it hasn't been that long, the blood test would give you more information. I really think you need to get both the pregnancy test and urinalysis to be able to begin to sort this out. I hope this helps. Please let me know if I can provide further information or clarification.