Common Questions When Worrying About STDs

Questions about sexually transmitted diseases (STDs) generally fall into two categories. The first includes variations of "I think I might have an STD." The second includes questions and comments from people who just found out they have an STD.

Both types of questions have one thing in common—the people asking the question desperately need information that can help them figure out how to move on with their lives in a safe and healthy way.


7 Tips For Preventing STDs

This quick reference can help. The following are answers to and discussion of the most common questions we get from people who are worried about the realities of having an STD.


How Soon Will You Know?

chart showing common incubation times


How soon will you know if you have an STD after having unprotected sex?

The simplest answer to this question is that you can't know if you got an STD during an episode of unprotected sex until you get tested. That's because many, if not most, STD infections are asymptomatic. In other words, they don't cause any symptoms.

However, what you probably actually want to know is how long you have to wait until STD symptoms show up if you're going to see them. The answer varies from disease to disease. It could be anywhere from a few days to a few years.

To make things even more confusing, there's also a window period between when you are infected with a disease and when you can first test positive for it. That varies with every STD and may extend to six months or more.


Could Your Partner Really Not Know?

Virus herpes genital

Stocktrek Images/Getty Images

Could your partner really not know they had herpes before giving it to you? A lot of people who are newly diagnosed with herpes refuse to believe their sexual partners when they say they didn't know they had genital herpes.

Some of them may be lying. However, there are a lot of people who really have no clue they are infected with one of the herpes viruses. Infections often have no symptoms.

In addition, healthcare providers do not regularly perform blood tests for herpes unless someone has a known exposure. Some healthcare providers aren't even willing to test people who specifically ask.


Is It Too Late to Use a Condom?

pile of condoms
CatLane/Getty Images

Should you use a condom after you have already had unprotected sex with a partner?

There is a common misconception that if you sleep with someone with an STD, you will automatically get that STD the first time. That isn't true.

Still, people often use that belief as a reason to continue not using condoms or other forms of protection after they've slipped up. "After all," they rationalize, "if I was really at risk from this person, then I'm already in trouble." Fortunately, however, that isn't true.

It's certainly best to practice safer sex every single time you have sex. However, messing up once doesn't mean that you can't go back to doing it right.

It's always worth using a condom the next time you have sex even if you didn't this time. Just because someone has an STD, it doesn't mean their partners will automatically get it.


Is Penile Discharge Gonorrhea?

Urine Cup

David Whittemore / E+ / Getty Images

Does discharge from your penis mean you have gonorrhea?

Penile discharge can be a symptom of any of a number of common STDs. The only way to tell which one you have, or if you have an STD at all, is to go visit your local healthcare provider or a free clinic and get tested.

There is no way for someone to diagnose what STD is causing a discharge without doing laboratory tests. Don't worry, though. These days, that mostly means giving a urine or blood sample. You probably won't need to undergo a urethral swab.


Do You Have to Tell Your Partner?

Couple in bed
Noviembre Anita Vela/Moment/Getty Images

Do you have to tell your partner you have an STD?

Disclosing an STD to a potential partner is a good thing to do. That's true both because it's right and kind and because not disclosing could lead to a lawsuit. People deserve to have the opportunity to make informed decisions about their sex lives. That requires an open and honest discussion about risks.

Acknowledged STD infections aren't necessarily relationship deal-breakers for people. That's true even with life-long infections such as HIV and herpes. On the other hand, lying about an STD almost always will cause a problem. 

You don't need to bring up these topics on the first date. Just don't put the conversations off until the night you plan to first have sex. Having to deal with a heavy discussion in the heat of the moment is a bad idea. It may make it more likely your partner will make a decision they'll regret.


Can You Reduce Oral Sex Risks?

oral sex risk chart

Elizabeth R. Boskey

How can you reduce the risks of getting an STD from oral sex, and do you really need to?

A lot of people don't really think of oral sex as sex. However, it can pose a significant STD risk. That's why, unless you have both been comprehensively tested, it's a good idea to use condoms or dental dams whenever you have oral sex.


Does HPV Have Risks for Men?

Human papilloma virus (HPV), coloured transmission electron micrograph (TEM)
Science Photo Library - PASIEKA/Brand X Pictures/Getty Images

Human papillomavirus (HPV) causes cervical cancer. But that doesn't mean that men (and any people without a cervix) aren't at risk of other HPV-related diseases. Risks from HPV include a variety of sexually transmitted cancers and genital warts.

There is not yet a commercial HPV test for people with male genitalia (the usual HPV tests are done on cervical cells), but that doesn't mean it's not important. It's just that it's hard to figure out how to implement population-wide testing in a useful way.

People of any sex or gender (including men) can get the HPV vaccine to reduce their risks from the virus.


Won't You Know If You Have an STD?

woman talking to doctor
Cultura RM/Zero Creatives / Collection Mix: Subjects / Getty Images

The truth is, it's quite easy to be infected with an STD and have absolutely no idea. STD testing is not part of the standard healthcare routine. Furthermore, many STDs can have no symptoms for years.

So the only way you'd know for certain if you had an STD would be if you'd asked your healthcare provider to test you and gotten the results. Even then, your certainty would only last as long as you continued to avoid potentially risky behavior.


STD Without Cheating?

African American couple dancing
Jag Images/Cultura/Getty Images

If your partner has an STD, is it at all possible that they didn't have sex with a person outside of your relationship?

When someone who is in a long-term relationship that the partners agreed would be exclusive is diagnosed with an STD, it can be heartbreaking. The first instinct is almost always to assume that their partner has cheated on them. While in many cases that may be true, it isn't always.

If you both weren't tested before starting the relationship, or you are early in the relationship, it's possible that your partner might have had an asymptomatic infection since before you got together. They also might have only infected you recently even if you've been involved for years.


HIV From Oral Sex With a Prostitute?

HIV Particles

BSIP/UIG/Getty Images

Can you get HIV from oral sex with a sex worker you paid for sex?

This specific question comes up frequently. (It's most often asked by men who have just returned from trips abroad.) It actually conflates several misconceptions that are discussed in more detail above: 

  • That the main STD risk of oral sex is HIV
  • That all sex workers have HIV
  • That STDs are transmitted every time you have sex.

None of those things are true.

The risk of acquiring HIV through oral sex may be relatively low. However, diseases like herpes, gonorrhea, and syphilis can all be spread quite easily during oral sex.

It's a good idea to use protection whenever you engage in any type of commercial sex (or casual sex). These things do potentially have substantial risks. Besides, if you're aware enough to be worried about HIV after you've purchased oral sex, then you should know enough to take precautions in advance.

Was this page helpful?
Article Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. Lee KC, Ngo-metzger Q, Wolff T, Chowdhury J, Lefevre ML, Meyers DS. Sexually Transmitted Infections: Recommendations from the U.S. Preventive Services Task Force. Am Fam Physician. 2016;94(11):907-915.

  2. Centers for Disease Control and Prevention. Genital herpes - CDC fact sheet (detailed). Updated January 31, 2017.

  3. Menezes Filho JR, Sardinha JCG, Galbán E, Saraceni V, Talhari C. Effectiveness of syndromic management for male patients with urethral discharge symptoms in Amazonas, BrazilAn Bras Dermatol. 2017;92(6):779–784. doi:10.1590/abd1806-4841.20175453

  4. Centers for Disease Control and Prevention. STD risk and oral sex - CDC fact sheet. Updated December 1, 2016.

  5. Centers for Disease Control and Prevention. HPV and men - fact sheet. Updated December 28, 2016.