STD Symptoms in Receptive Oral Sex

Illustration by Édouard-Henri Avril of fellatio scene

Illustration by Édouard-Henri Avril of fellatio scene

This article will focus on the possible STD symptoms you can get if you use your mouth on your partner’s genitals.

This applies to both men and women and also if you partner was a man or a woman.

Click here for STD symptoms in Men – i.e. the possible STD symptoms Men can get when they insert their penis into their partner’s mouth, vagina or anus

Click here for STD symptoms in Receptive Anal Sex – i.e. the possible STD symptoms in men or women who allow their partner to insert his penis into their anus

Click here for STD symptoms in Women

First of all let’s get rid of the big elephant in the room: HIV.

Is it possible to get HIV from oral sex? Click here for a detailed article I wrote on this topic.

In a nutshell, it is theoretically possible but highly unlikely. I personally think it is not possible. The only estimated risk ever given for this is 0.04%. This only applies for a person who uses his/her mouth on the partner’s penis and allows him to ejaculate in the mouth (assuming he is HIV +ve). Even then, it is maybe 0.04% possible.

As for the other STDs, you can classify the possible symptoms as follows:

1. Throat Symptoms – Sore throat, painful throat, pus on the tonsils etc

2. Skin symptoms – Ulcers, Blisters etc around the mouth

3. General symptoms – Fever, Swollen lymph nodes etc

1. Throat Symptoms

These symptoms are very much like any other sore throats you have had in the past. It is more suggestive of an STD if the pain is very severe or there is yellow pus on the tonsils. Most people think the tonsil is the teardrop shaped thing that hangs down in the middle at the back of the mouth. This is the uvula, it is not the tonsils. The tonsils are the 2 spongy round things you see on the sides.

Since the sore throats caused by STDs like Gonorrhea or Chlamydia can be no different from your usual sore throat, the only way to know if you have caught an STD in the throat or not is to get a throat swab.

Very painful ulcers in the throat especially if the lymph nodes in the neck are swollen and tender, is very likely to be caused by Herpes.

Although not common, you can also see warts in the mouth caused by HPV. These look like red colored growths in the mouth most commonly found on the inner lining of the cheek.

Who are the culprits?





When do symptoms usually appear?

Most commonly within the first 2 weeks of infection but can also take months to appear. Some infections do not even show any symptoms at all.

2. Skin Symptoms

– Ulcers/Blisters. This applies mainly to Herpes. This appears as painful blisters and/or ulcers usually on the line where the lips and the skin meet (vermilion border). However, these ulcers and blisters can also happen anywhere on the face. Ulcers are breaks in the skin. They are usually wet. If the area of skin surrounding it is red, this is more suggestive of Herpes. Blisters are fluid filled sacs like bubbles on the skin. Herpes ulcers are usually painful.

If you have a single painless ulcer that is slightly bigger (> 8mm), it may be a symptom of Syphilis. This is rare in oral sex but still possible.

– Growths. As discussed above, HPV can cause growths inside the mouth. These same growths can also appear around the mouth and lips although this is rare. This will look like skin colored lumps which have an uneven surface like a cauliflower.

Who are the culprits?




When do these symptoms usually appear?

Syphilis ulcers can take 9 to 90 days to appear. Herpes ulcers can appear as quickly as within a week or may take months. This also applies to HPV.

3. General Symptoms

– Swollen lymph nodes. Swelling of the lymph nodes is a normal and natural way the body fights off an infection. When an area is infected, the lymph nodes close to it will swell to help fight off the infection. So if there is an infection in the throat, the lymph nodes in the neck will swell. This is a very general symptom and can be caused by STDs or non-STD infections.

– Fever. This is an extremely rare symptom for STDs affecting the throat and mouth. If you have a fever, chances are that it has absolutely nothing to do with your oral sex encounter.

Who are the culprits?




When do these symptoms usually appear?

Swollen lymph nodes on their own are not a symptom of STDs. However, if you have ulcers in the throat or a bad sore throat AND swollen lymph nodes in the neck, this is more suggestive of STDs.

So the time of onset is related to when the primary symptoms (ulcer, sore throat etc) appear.

What do you do now?

Not everyone who is infected with an STD will develop symptoms. Of course if you do have any of the above symptoms, please see us as soon as you can.

If you do not have any of the symptoms, get a full STD screening at 1 month  post exposure to be 100% sure you are clear of everything.

For possible STD throat infections, we can swab the throat to test for Chlamydia, Gonorrhea, HPV and Herpes.

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If you have any questions, visit our free online forum on sexual health, HIV and STDs.

Related Topics:

Cost of HIV/STD Screening at our Clinics

HIV Testing FAQ

STDs – General Info

STD Symptoms in Women

STD symptoms in Men

STD symptoms in receptive Anal Sex


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All Our Doctors are Fully Certified and Trained to conduct specialised STD Screening,  STD Testing & STD Treatment and HIV Testing.

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  1. Hi, I have a partner that I’ve been on and off again with for the past 9 months. We started sleeping together in May and we always used protection. One evening, the condom broke, however, neither he or I noticed so he ejaculated inside of me. Everything was fine the following day. A few days after that, he released in my mouth and it had no taste so I didn’t think anything of it. We had unprotected sex memorial day from which I contracted BV (this has happened each time we had unprotected sex so we completed a partner treatment without getting tested for STIs). I took a topical treatment and since we were not able to have vaginal sex, I performed oral again (8th or 9th of June) but this time his release tasted really bad. I was tested for STI’s June 12th and was diagnosed with Chlamydia. I am just wondering if he could have contracted the infection from someone he was with before me and only recently began showing symptoms or is there a chance he got it more recently? (asking because of the change in taste of semen) I understand that foods can make a difference but he’s pretty consistent with what he eats. I spoke with my previous partner and he’s been tested twice this year with no diagnoses. Kind of torn on what to believe/think hopefully, you guys can provide a little more insight. Thank you!

    • Dr Elaine Loh

      Dear Liza,
      A change in taste in the semen does not always indicate an infection but it does not rule out the possibility as well. I would strongly advice for your partner to get tested and treated as well in view of your recent diagnosis on 12th June. Do come in and speak to our doctors for more advice.

  2. I gave my boyfriend oral sex he had a boil or ingrown hair now he’s in antibiotics will I be ok

    • Dr. Julian Ng


      Are u asking if you could have been transmitted with STDs? Unless boil is tested positive for one of the STDs, then the answer is no.

  3. My wife gave me oral and immediately after I had a sore (friction?) on my penis that went away in only a couple days. About 4 days later she woke up with a sore throat and white spots on her tonsilis. Two or three days later so did I. I have no other symptoms but she has had phlegm build up and nausea. What is going on?

  4. Hi! My name is Mark. After I had sex with multiple sex partners (oral sex only), there’s a tingling feeling throughout my body that I feel when I feel irritating, shocked, heat discomfort and chilled then I have lumps behind my ear and neck. My last sex was October 2017 then I got HIV test last January 2018 AND the result was non-reactive. Is there a possibility that I have STD? Thank you.

    • Dr. Julian Ng


      It is difficult to ascertain if those symptoms are STD-related. However do bear in mind that some STDs esp in men have no symptoms. Thus if you are concern and given the fact you have multiple sex partners, you may want to consider doing STD testing. Please consult a doctor to discuss further. If you prefer, you may visit us at:

  5. I had a small bump on the left corner of my upper lip. I gave my boyfriend a blow job thinking it was a pimple. After protected sex I realized it was an outbreak from my HSV-1. Is he at risk of HSV-2? Should I have him get checked? I’m legitimately freaking out!

  6. PanickedGirl


    I’m lesbian and perform breast licking and sucking to my girl partner 7 months back. No oral sex.

    I’m feel a lump at my neck along this period & swollen tonsil. I’d been examining my throat along all this while and i saw it seems swollen all the time.

    Does these symptoms means I infected with HPV? I did not get the vaccine yet.

    I seen ENT and they mentioned nothing serious. Is there any test that i can request from them to perform on my tonsil or throat??

  7. I had an unprotected oral sex with a csw, getting sucked, licking and French kiss, and protected vagina sex about 13 days ago.

    My last intercourse was a protected oral and vagina sex about 6 days ago.

    I am now feeling itch all over my body, no rash though. Should I go for a HIV test now or any STD test?

  8. Hi Doctor,

    I received a handjob today and while i ejected this lady use her mouth to hold on to my unload. Will this cause any STD?

    • the hold on was like 4 to 5 sec which i’m worry i did go on.

    • If there was oral sex involved, yes you can get STDs such as chlamydia, gonorrhea, and herpes. If you have concerns, please visit us for a proper consult and evaluation.

  9. i have given oral sex to a guy and during the next couple of days i was feeling slight discomfort in my throat. on the 4th day i noticed a small spot on my uvula and im worried that it might be an STD. it has the same colour as my uvula and it makes me feel uncomfortable every time that i swallow.

    i am aware that most STDs need about 2 weeks to show symptoms, but if this is not an STD, what cab it be?

    Thank you for your time doc!

    • We cannot really make a diagnosis unless you visit us for a proper consult and evaluation. It could be a traumatic ulcer; it could be herpes; it could be oral chlamydia or gonorrhea; it could be absolutely nothing. If you have concerns, please see a doctor.

  10. Hi Doc

    I had unprotected oral sex with an escort two weeks ago. Not sure if i am just paranoid but recently i feel an itch in my penis but no discharge or whatsoever. No problem with urination.

    Should i be concerned with STD and am i at risk of hiv?

    • There is a risk of STDs such as chlamydia and gonorrhea with unprotected oral sex. A significant proportion of these infections may not show any symptoms in males, so it would be best to come down for a consult and evaluation. Your risk for HIV is very negligible however.

      • as my exposure is only 2 weeks, will the tests performed be conclusive? or is there a recommended period before the tests are performed.

        • A urine STD screen would be conclusive (chlamydia, gonorrhea, etc.), but if you wish to check HIV the window period would be 28 days.

  11. I had protected sex and deep mouth kissing..I got some white layer on shaft of penis . I showed doctor he told it’s nothing but smegma…I used a cream and it was all well ….after this I got a pimple inside my lip ..later on my whole tounge got small blisters and cheeks got lines on both side (line alba) . I shown to ENT doctor he told it’s normal gave some medicine and Tounge got well…but line in cheeks are not gone …from last three days got uvuilitus …shown to doctor again but he was not able to identify and told no medicine required only have hot water and good food. But I am having constant feelings of uvula touching my tongue. Is it a std…can it be a HIV symptoms….I had all time protected sex and only kissing (tounge to tounge) .Can I use amoxicillin myself and wait for results or shall I go for STD screening

  12. i have a whole on the side of my throat and bumps in the back of my throat what is this?

  13. Someone

    Hello, look im a young female and i just gave my boyfriend slightly aggressive oral sex about 10 minutes ago and immediantly after i had felt something odd in my throat. After inspecting my throat in the mirror, immediantly i could see and feel that my uvula is long and laying on my tongue. Despite being long, it seems to look as of it had a red drop on the end of it, (its apart of it still). Im really scared and im sure hes clean but i dont know how bad this is or when it will go away. My breathing seems to be fine but i also lose breath slightly to what i am hoping is the heat from the weather. Im only 16 and i cant tell anyone and im afraid to go to the doctor or that my mom will know. Im really scared, please help!

    • STD’s do not cause symptoms immediately after exposure. It can just be from trauma. That doesn’t mean you are not at risk still, just that these particular symptoms are not related to an STD. so if you have concerns please see a doctor.

  14. Bill jones

    Thank you for the response. I understand it can be difficult to speculate, but I have seen varying numbers and responses to these questions and was curious if you had any insight. In theory if I was orally infected, What are the chances that you can spread this:

    A) kissing someone
    B) deep kissing (tongue involved)
    C) performing cunnilingus

    • Bill jones

      Sorry. I also meant to ask, how common is it that someone would experience these symptoms 16 days after exposure? I have seen studies saying normally 2 to 5 days, up to 10 days, and the vague range of 2 days to a month.

  15. Bill jones


    I performed fellatio on a man about 4 weeks ago. I have had pain in my neck but not where I would usually get a soar throat. I am going to the doctor in a few days to get it checked, but I feel like I am making myself believe I am infected when my symptoms don’t necessarily match what others say. The pain is in my neck next to my Adam’s apple and not in the back of my throat. I have not seen any discoloration in the back of my throats and/or tonsils. It hurts sometimes when I swallow but not every time. Eating and drinking do not bother it either. Is it possible this is a muscular problem and not symptoms of an std?

    • I agree with you that since your pain is in the anterior neck, it does not fir the usual symptoms of an STD throat infection. That is not to say you do not have an STD. The only way to know is to test. I am happy you will be seeing your doctor. I also agree with you that anxiety can make you place an over-emphasis on “symptoms” that you would have normally ignored.

  16. Hi Doctor,
    I had oral sex about 3 weeks ago. Now I have a sore throat and it is difficult to study. Should I be concerned or see a doctor about it?

    • You should absolutely see a doctor. You need to find out what is causing your sore throat. It may or may not be related to your sexual exposure.

  17. Supernova

    I had protected oral sex worker two days ago. Today, I developed a single blister on my top groin area. In this case, does that sound like a herpes or any other std?

    What are the chances of std in the following scenario:
    1) Protected Oral Sex
    2) Using the same towel she uses to wipe her finger that touch her vagina, on my penis

  18. Supernova

    I had protected oral sex with a sex worker 2 days ago. During the process, she fingered herself and use a towel to wipe her fingers and then my penis.

    Under the two scenarios:
    1) Protected Oral Sex
    2) Using same towel for both her finger and my penis

    • Risk of STD is very low. However, condom is not 100%.
      Please see a doctor to get yourself assessed.

      • Hi doc,
        I had sex with my partner unprotected Friday by Saturday afternoon my whole lower back was covered in a hot itchy rash, I used some creams I had and didn’t think anything of it then we had sex Saturday night and within 5 minutes both my whole thighs and my back had come out In a red hot, spotty, itchy rash. We haven’t had sex since then, I still have a slightly spotty rash on my back but it’s not hot it’s nowhere near as itchy or red? I’m going to get checked Tuesday but do you think that could be an STI???

        • This does not really sound like an STD, more likely an allergic/hypersensitivity reaction. If you are concerned, please visit a doctor to have it evaluated.

  19. Hi doctor,

    if I have had possible exposure (giving blowjob) no ejaculation only precum, happened 3 months ago, do I have to be worried about any STD?

    one mouth ulcer (slight pain) underneath tongue and 2 very small white dots on lips (<1mm, slight pain), white patches only at the inner back half of tongue extending towards the epiglottis, some flu symptoms, no sore throat, mild fever..?

    thank you!

    • Well, I’m not sure what you meant by possible exposure. But giving oral sex does put you at risk of throat/oral cavity infection such as gonorrhoea, chlamydia, herpes and HPV. You may want to see a doctor to get yourself checked since you have some symptoms you are worried about. You are welcomed to visit us for a consultation.

  20. Hi doc,

    Not sure i got std or not, had unprotected oral giving and receiving with a chat girl. About 2 weekslater, felt stinging pain sometimes on my left side of penis, bottom of ahaft near to testicle and tingling feeling at the tip of my penis. No sore, discharge, rashes. Peeing is normal, not pain at warts.
    1) could thia b sign of std?
    2) if i just do the urethris test, will this b conclusive for an oral receiving n giving? Or should i go for more test?
    3) Do you do penis check for men other than std?

  21. I am suck the breast nipple can possible to get hiv or std
    i am tested hiv test in 88 it ok

    • You cannot get HIV from sucking on a breast. You can get STDs but this is rare. Generally speaking HIV tests at 88 days is conclusive but that also depends on what kind of test was done.


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