A vaginal (transvaginal) ultrasound is usually not painful. MedlinePlus says the probe "will not hurt" but "may be mildly uncomfortable", and RadiologyInfo says the scan is usually more comfortable than a manual gynaecological examination. It can hurt if you have vaginismus, a pelvic infection, endometriosis or vaginal dryness, and you can ask for a chaperone, insert the probe yourself, or stop the scan at any point.
Is a vaginal ultrasound painful?
No, a vaginal ultrasound is usually not painful. MedlinePlus says that in most cases there is no pain, that the probe "will not hurt" and that it "may be mildly uncomfortable" because only a small part of it enters the vagina. Cleveland Clinic says the scan "shouldn't be painful" and that pressure or mild discomfort usually fades quickly. RadiologyInfo adds that the sonogram "should not be painful or significantly increase your discomfort" and that it is "usually more comfortable than a manual gynecologic exam".
The NHS is more cautious. Its ultrasound page says internal scans "can be uncomfortable when they're put inside your body or moved during the test", and it tells you to say so if you feel pain, because the person scanning you can help you feel more comfortable.
What most women notice is pressure, not pain: the probe pressing against the cervix and the wall of the vagina while it is angled to see each ovary, and a cold feeling from the gel. A 2020 review in the Australasian Journal of Ultrasound in Medicine (Collins and colleagues) found that pain and embarrassment levels are "typically low" with transvaginal ultrasound, but it also reported that only 40% of women who did feel pain told the sonographer. Tell the person scanning you; they can change the angle, slow down or stop.
The word "sonography" on your bill means the same scan; the difference is explained in our guide on ultrasound versus sonography.
What does a transvaginal scan involve?
A transvaginal scan is a 15 to 30 minute examination in which a thin, covered probe is placed a few inches inside the vagina to picture the uterus, cervix, ovaries and fallopian tubes. RadiologyInfo and Cleveland Clinic describe the steps:
- You empty your bladder first; RadiologyInfo says the probe is inserted "after you empty your bladder", unlike a scan through the tummy, which needs a full bladder.
- You undress from the waist down and lie on your back with your knees bent.
- The probe is round-tipped and, per Cleveland Clinic, "less than 1.5 inches in diameter". It is covered with a sterile cover (the NHS says a latex cover) and coated with gel.
- RadiologyInfo says the doctor or technologist "inserts about two to three inches of the transducer into the vagina" and angles it to see each organ from several directions.
- Cleveland Clinic gives a duration of about 15 to 30 minutes; RadiologyInfo says most ultrasound examinations finish within 30 minutes.
| Transabdominal (through the tummy) | Transvaginal (internal) | |
|---|---|---|
| Bladder | Full | Empty |
| Probe | Moved over the skin with gel | Covered probe placed inside the vagina |
| Sensation | Cold gel, mild pressure | Pressure, feels like inserting a larger tampon |
| Best for | Overview, bladder, large masses | Detail of the endometrium, ovaries, early pregnancy |
When can a transvaginal scan hurt?
A transvaginal scan can hurt when the vagina or the organs behind it are already tender or tight. The NHS says an external scan may be uncomfortable over an already painful area, and the same applies inside. Four conditions stand out.
- Vaginismus. The NHS describes it as the vagina tightening up involuntarily whenever penetration is attempted, causing a burning or stinging pain. It can happen with a tampon, during sex or during a smear test, and the reaction is automatic. Tell the sonographer beforehand; the NHS says it is treatable with psychosexual therapy, relaxation and vaginal trainers.
- Pelvic infection. The NHS lists "pain felt deep inside when you have sex" and pelvic pain among the symptoms of pelvic inflammatory disease. A probe pressing on an inflamed uterus or tube can reproduce that pain.
- Endometriosis. The NHS lists pain during or after sex and pain in the lower tummy and back as symptoms, and says the ultrasound for endometriosis "may be done on your tummy or inside your vagina".
- Vaginal dryness. The NHS says dryness after the menopause, while breastfeeding or on some medicines causes pain or discomfort, including during sex. Extra gel helps.
See a doctor the same day if you have sudden, severe pelvic pain, or pelvic pain with fever or vomiting. The NHS says these need urgent assessment because an ovarian cyst can twist or rupture. In India call 112 or go to the nearest government hospital emergency department.
How can I make a transvaginal ultrasound easier?
You can make the scan easier by emptying your bladder, telling the sonographer about any pain or past bad experience, and asking to control the first part of insertion yourself.
- Empty your bladder just before you go in; RadiologyInfo says the probe goes in after the bladder is empty, and a full bladder adds pressure.
- Remove a tampon if you are on your period; Cleveland Clinic says to take it out before the scan. Bleeding does not stop the scan.
- Say what hurts before it starts. The Collins review says the sonographer should provide "adequate explanation of what is involved" and watch for signs of distress; most women who felt pain in its data never said so.
- Ask to insert the probe yourself. The NHS says you can ask to insert the probe yourself, and the review quotes the Australasian Society for Ultrasound in Medicine advice to offer the patient the option of introducing the transducer "as she would a tampon".
- Tell them about latex allergy. The NHS says the cover is latex and an alternative can be used.
- Ask for more gel if you have vaginal dryness; the NHS recommends water-based lubricants for dryness.
- Ask them to stop. The NHS says you are in control and can ask to stop at any time.
Cleveland Clinic says any gel-related discharge afterwards should clear within 24 hours. The scan itself is quick; the first minute is usually the only uncomfortable part.
What are my rights on consent and a chaperone?
You have the right to an explanation, to say no, to a chaperone and to stop the scan. The NHS ultrasound page says to tell the person doing the scan if you want a chaperone, who can be someone you know or a member of staff, and that you can ask them to stop at any time. The Collins review (2020) sets out the professional standard in more detail: verbal consent is sufficient for a routine transvaginal scan, written consent is expected for higher-risk procedures such as scans guiding a biopsy, the patient must understand "they have the right to terminate the examination at any point", and a withdrawn consent must end the examination immediately.
India has no written national rule on chaperones. A 2012 letter in the Indian Journal of Plastic Surgery (Sreekar and colleagues) says such guidelines "are lacking in Indian medico-legal documents", but that a chaperone during intimate examinations "is routinely followed in most centres", and it recommends that the chaperone's name is written in the record. In practice this means:
- Ask for a female staff member to be present if the operator is male, and ask that her name is noted.
- Ask what the scan is for and what will happen before you undress; many women expect a scan on the tummy.
- You can decline the internal scan and ask whether a transabdominal scan will answer the question.
Who performs a transvaginal ultrasound in India?
In India a transvaginal ultrasound is performed by a registered doctor, usually a radiologist or a gynaecologist, at a centre registered under the Pre-Conception and Pre-Natal Diagnostic Techniques (PC-PNDT) Act. MedlinePlus says the probe is inserted by a technician or doctor, "usually an obstetrician-gynecologist", and RadiologyInfo says a radiologist analyses the images and sends a signed report to the doctor who requested the scan. In Indian hospitals both patterns exist: the radiology department does the scan and reports it, or a gynaecologist scans you in the clinic and tells you the result there.
The PC-PNDT Act matters to you in three ways. A 2012 letter in the Indian Journal of Radiology and Imaging (Bano and colleagues) explains that equipment in unregistered centres is sealed and seized, and that unauthorised persons conducting antenatal scans are to be dealt with strictly; look for the registration certificate on the wall. A companion article in the same issue (Patnaik and Kejriwal) says that for every pregnant woman scanned, the centre must complete the mandatory Form F and keep it for two years, so you will be asked for your name, address, the referring doctor and the reason for the scan. The Act bans sex determination; no registered centre will tell you the sex of the baby, and asking is an offence.
Prices vary by city and by whether a Doppler study is added; see ultrasound cost in India. Government hospitals and hospitals empanelled under Ayushman Bharat scan at low or no cost for eligible patients.
What are the alternatives to a transvaginal scan?
The main alternative is a transabdominal pelvic ultrasound through the lower tummy with a full bladder, and for a few questions an MRI. Cleveland Clinic says the transabdominal scan should not cause any pain, but it needs a full bladder because "a full bladder helps the transducer's sound waves travel", which is why you are told not to pass urine beforehand; our guide explains what happens if you pee before an ultrasound. The trade-off is detail: the internal probe sits next to the uterus and ovaries, so RadiologyInfo lists it as the test for the endometrium, polyps, fibroids, ovarian cysts and blocked tubes.
Other options exist for specific situations:
- Transrectal scan. The NHS says the same tube-shaped probe can be placed in the bottom; Cleveland Clinic describes a rectal scan done lying on your side.
- Saline infusion sonography. MedlinePlus says a variant with fluid in the uterus is sometimes used to see the lining more clearly; it is a transvaginal scan with a thin catheter.
- MRI. Cleveland Clinic says your doctor may order more tests such as an MRI if the ultrasound does not settle the question; see MRI scan cost.
No test is forced on you. If a transabdominal scan answers the clinical question, ask for that; if it does not, the transvaginal scan is short, safe and in most women causes pressure rather than pain. This guide is general information from the sources listed below, not medical advice; a registered doctor makes decisions with you.
