Sex during Menstruation – The Good, the Bad and the Ugly

Sounds gross, yes, but there are some who practice it.

I’ve come across people who ask how safe sex is during menstruation. It is still a controversial issue. For one thing we are sure about is that it never fails to make you frown upon hearing it.

The good and bad of period sex are yet to be discovered. However, a number of theories suggest that the practice more of a disadvantage rather than an advantage.

The Good

In a way, it relieves menstrual cramps. How? Endorphins (a type of hormones to relieve pain and affect emotions) are secreted during orgasm and thus decrease menstrual pains.

The Bad

Naturally, during menstruation, the veins of the uterus are congested and are prone to rupture easily. Vaginal walls swell as well during menstruation. This explains the dull pain in the vagina during menses and is 100% normal. Having intercourse during your period can increase the chances of irritation to the swelled up walls. The advantages of endorphins at this point mask the danger of period sex where irritation of the vaginal walls and introduction to infection are major risks. Any wound or bleeding is a fine gateway to infection.

The cervix is slightly opened during menstruation to let out blood. This heightens the risk of infection, not being limited only to the vagina, but additionally to the uterus. The penetration of the penis into the vagina during menstruation is no more than the introduction to germs at a time when the body is unable to fight them (studies have shown that immunity is decreased during menstruation).

Orgasm results in rhythmic uterine contraction. During menstruation, this helps shed blood faster and shorten your periods. A similar reaction happens when a menstruating woman lifts up heavy loads or does strenuous exercises. This explains why most athletes experience amenorrhoea (missed periods).

Sex during the menses also increases risk of HIV infection.

The Ugly

Obviously, period sex can be really, really messy and unhygienic. This fact by itself drops the interest of both parties about the idea of having sex during menstruation.

So, is period sex good or bad? Well, momentary pleasure versus risky health – you be the judge.

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  1. My friend was conceived before marriage with her boy friend and then they had more physical relationship then she married to other person and now she is conceived is there any chances of hiv for her

    • Sorry I do not really understand your question. There is no way I can determine your friend’s risk of HIV from this information. If she is concerned, just get tested.

  2. we had sex during menstrual period but now the lady is complaining of hitching of outside vagina and some white discharges,what could be the problem?? while i had seen any sign of infection or sign??

  3. Hi Doc,
    I had safe-intercourse(condom) with my girlfriend on what we believe were the final couple days of her period if not the last as after there was very little or no spotting left. We immediately noticed more blood after sex. It’s now been almost two days after sex and my girlfriend noticed continued blood flow coming out and she’s feeling pain in that general area. What could be problem? Thanks.

    • Dr. Julian Ng


      Your partner needs to be assessed by a doctor as it is not possible to diagnosed what it may be based on the symptoms.

  4. Hi doc, i have intercourse with my partner while having on my mens. we dont use comdom and he released inside me twice. and im using injectable for our FP there any chance of pregnancy ? thanks.

    • Dr. Julian Ng


      No contraception method is 100% failsafe. Please visit your doctor if concern about pregnancy.

  5. I had sex with my girlfriend without a condom during her periods,now my penis is paining since then(4 days). Is it something serious or does this usually happen?

  6. I had sex with my girlfriend after termination,and when i urinated some blood came out,um i going to be affected anyhow by any disease

    • Dr Elaine Loh

      I assume you meant termination of pregnancy?
      It is impossible to answer your question based on your description. You should see a doctor if you are concerned.

      You can find us here : Locations

  7. good morning doctor, i had sexual intercourse with my wife during her menstruation, ever since then my penis is not risen again, please help me out

  8. I had unprotected sex with my wife on the fifth day of her period it is healthy enough to get pregnant or i will catch some disease. And also her blood is come out & touch to my penis it will get some problem or disease ???

    • Dr Elaine Loh

      Risk of pregnancy is extremely low, but not impossible. Why do you think you will catch some disease if your wife is healthy? Please do not be so paranoid.

  9. Why does it hurt while having sex on your period? Especially around the glutes?

  10. Marcelgho

    Hi doc had unprotected sex with my bf on the 25th November and wiped pink discharge on the 17th December but my period cane on time on the 21 December but light for three days and on time in January 18th but light too for three days too all abnormal for me cos my period are always heavy flow for five days can I be prego?

    • Dr Elaine Loh

      It is difficult to tell based on your description. If you are concerned, do a pregnancy test or see a doctor for an assessment.

  11. My boyfriend and I have period sex all the time as my hormonal implant causes near constant light bleeding, however last time I was slightly heavier during and he was experiencing discomfort, we stopped before he came, and noticed blood and fluid had made its way into his urethra. Would this have caused his discomfort?

    • Dr Elaine Loh

      There are a lot of factors that can cause discomfort during sex. It is impossible to answer your question. However, blood and fluid should not really cause discomfort. In fact, it gives more lubrication.

  12. Hey Doc me and my boyfriend had sex while I was on my period and my monthly stayed on 8 days… What does that usually mean?

    • Dr Elaine Loh

      I don’t really understand your question. If your concern is about pregnancy, I think your risk of getting pregnant is negligible if you have sexual intercourse during your period.

  13. hi doc.last night i had sex with my gf who is having her period already, i used a condom during the intercourse ,but found blood stains around d condom and also on the sheets. is she really safe and likewise ,am i also open to get infected

    • Dr Elaine Loh

      If she was having her period during intercourse, I am not surprised that you found blood stains on the condom and bed sheet.
      If you are referring to STD, I think risks of STD transmission is low given that you have used a condom. If you are concerned, please see a doctor.

  14. I have sex wit my boyfriend the second day of my menstration,and the blood stop to flow the third day, any pills that can be taken pls doc, nd wat is the chance of my pregnancy, because he did withdrawal.No condom

    • Dr Elaine Loh

      Your risk of getting pregnant is extremely low given that you had sex during menstruation. However, if you are concerned, please visit a doctor for an assessment and emergency pills.

  15. can i sex with my file, she is yesterday is period start ,

    • Dr Elaine Loh

      I don’t understand your question. Last time I checked, a file is an item. I’m not sure how you concluded that it’s a she.

  16. Zamoorat

    I have done sex with my husband and after 3 to 4 hours my periods start at the exact date is it harmful for me or not ? Also 2 to 3 time my liquid out during periods without sex is there any disadvantages of it?

    • Dr Elaine Loh

      Of course it is not harmful. It is not even harmful to have sex during period.

  17. hi doc. i just had a sex with my boyfriend last night without protection but only withdrawal and as i saw on my underwear after the sex, I saw some spots so im thinking that i already had spotting before we do the sex and this morning i have my period . Does me and my boyfriend safe? or are their any infection might happen to both of us? what will we do in order for us to prevent?

    • Dr Elaine Loh

      Safe from pregnancy? Yes, if you had menstrual period the next day.
      If you are concerned about STD/infection, see a doctor to get an assessment done.

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