Unusual Odor During Intercourse: Should You See a Doctor? - Obstetrics and Gynecology

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Unpleasant odor during intercourse?


Recently, I've noticed a strong odor in my vaginal discharge during intercourse, which wasn't the case before.
There is no itching in the genital area, and the color and amount of my discharge are normal.
What could be the cause of this? Should I see a doctor? I've also been staying up late lately; could that be a factor?

Anna, 20~29 year old female. Ask Date: 2015/08/01

Dr. Yang Wangjun reply Obstetrics and Gynecology


Hello: The normal vagina contains beneficial bacteria, primarily Lactobacillus species.
These include Lactobacillus acidophilus, Lactobacillus crispatus, Lactobacillus gasseri, Lactobacillus jensenii, and Lactobacillus iners, which produce lactic acid and hydrogen peroxide, maintaining the vaginal environment at a slightly acidic pH of around 4.0.
At this pH level, the growth of other bacterial species is inhibited.
When the vagina loses Lactobacillus, and lactic acid and other inhibitory substances are absent, the vaginal pH can rise above 4.5, leading to the overgrowth of other bacteria that secrete amines, resulting in a fishy odor.
This fishy smell can intensify after ejaculation during intercourse, as the introduction of semen raises the vaginal pH to around 7 for several hours, and the amines responsible for the odor become more pronounced at higher pH levels.
It is recommended to treat this condition with antibiotics and perform vaginal irrigation for disinfection.
Thank you for your message!

Reply Date: 2015/08/01

More Info


Experiencing an unusual odor during intercourse can be concerning, and it's understandable to wonder whether you should see a doctor. While the presence of an odor does not always indicate a serious issue, it can sometimes be a sign of an underlying condition that may require medical attention.

First, it's important to note that the vagina has a natural flora of bacteria that help maintain a healthy environment. Changes in this balance can lead to odors. Common causes of unusual vaginal odors include bacterial vaginosis, yeast infections, or sexually transmitted infections (STIs). Bacterial vaginosis, for instance, is characterized by a fishy odor and can occur even in the absence of other symptoms like itching or abnormal discharge. Yeast infections typically present with a thick, white discharge and may cause itching, but not always. STIs, such as trichomoniasis, can also cause a foul odor along with other symptoms.

In your case, since you mentioned that the discharge color and flow are normal and there is no itching, it may not be an immediate cause for alarm. However, the presence of a strong odor during intercourse is still worth investigating. Factors such as hormonal changes, diet, hygiene practices, and even stress can influence vaginal health and odor. For example, late nights and changes in sleep patterns can affect your overall health, including your immune system, which in turn can impact your vaginal flora.

Here are some steps you can take:
1. Monitor Symptoms: Keep track of any additional symptoms that may develop, such as itching, burning, changes in discharge color or consistency, or any discomfort during intercourse. This information will be helpful if you decide to see a doctor.

2. Hygiene Practices: Ensure that you maintain good hygiene. This includes washing the genital area with mild soap and water, avoiding douches or scented products that can disrupt the natural balance, and wearing breathable cotton underwear.

3. Diet and Lifestyle: Consider your diet and lifestyle. Certain foods, such as garlic, onions, and fish, can contribute to body odor. Staying hydrated and maintaining a balanced diet can also support overall health.

4. Consult a Doctor: If the odor persists, worsens, or is accompanied by other symptoms, it is advisable to consult a healthcare professional. A doctor can perform a thorough examination, take a detailed history, and possibly conduct tests to determine the cause of the odor. They may check for infections or other conditions that could be contributing to the issue.

5. Sexual Health: If you are sexually active, it’s also important to consider the sexual health of your partner. If they have any symptoms or concerns, it may be beneficial for both of you to get checked.

In conclusion, while an unusual odor during intercourse can sometimes be benign, it is always prudent to pay attention to your body and seek medical advice if you have concerns. Early intervention can help address any potential issues before they develop into more significant problems. Remember, your health and comfort are paramount, and a healthcare provider can offer guidance tailored to your specific situation.

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