HSG Test: Is It Painful? Procedure, Results & Next Steps

Is the HSG test painful? For most women, an HSG feels like strong period cramps for a few minutes while the dye goes in, and the cramping settles within an hour or so. A pain reliever taken beforehand helps. The dye part takes only a few minutes, and the whole test about 10 to 15 minutes. An HSG (hysterosalpingography, sometimes called the "tube test") checks whether your fallopian tubes are open and whether the inside of your womb has a normal shape. At Yaal Fertility Centre in Chennai, Dr. Rukkayal Fathima and our team use it, or its ultrasound alternative HyCoSy, to decide the right next step in your fertility plan.

What Is an HSG Test?

HSG full form: hysterosalpingography (also written hysterosalpingogram). Hystero means the womb and salpingo means the fallopian tubes.

During an HSG, a small amount of contrast dye is passed through the cervix into the womb while X-ray images are taken. If the tubes are open, the dye flows along them and spills out into the pelvis. If a tube is blocked, the dye stops at the blockage. The same images also show the shape of the womb cavity, so problems such as a septum, polyps, fibroids or scar tissue can be picked up.

You may also hear it called a tubal patency test ("patent" means open) or an HSG scan.

Why the Tubes Matter

The egg and sperm meet inside the fallopian tube, and the embryo then travels down the tube to the womb. If both tubes are blocked, natural conception and IUI cannot work. Tubal problems are behind roughly a quarter to a third of female infertility, usually because of past pelvic infection, endometriosis or earlier abdominal surgery. Read more in our guide to blocked fallopian tubes.

Who Needs an HSG?

Your doctor may suggest an HSG if:

• You have been trying to conceive for 12 months, or 6 months if you are over 35.
• You are planning IUI, which needs at least one open tube.
• You have had pelvic infection (PID), a burst appendix, an ectopic pregnancy or pelvic surgery.
• You have had repeated miscarriages and your doctor wants to check the shape of the womb.

It is usually one part of a wider female fertility evaluation, alongside hormone tests, an ovarian reserve (AMH) test and a semen analysis for your partner.

Is the HSG Test Painful?

Most women describe an HSG as uncomfortable rather than very painful. The usual pattern is:

• During the dye injection: cramping like a strong period pain, lasting a few minutes.
• Afterwards: mild cramps for 30 minutes to a few hours, sometimes with a dull lower backache.
• Rarely: a few women feel faint or sick for a short while as the cervix is handled. Lying down for a few minutes usually helps.

Why Some Women Feel More Pain

• Blocked tubes: when the dye cannot flow out, pressure builds inside the womb, so the cramp is stronger.
• A tight or narrow cervix: passing the thin tube (catheter) may take a little longer.
• Anxiety: tense pelvic muscles make the whole test feel harder.

How to Reduce HSG Test Pain

1. Take a pain reliever 30 to 60 minutes before the test, as your doctor advises.
2. Eat a light meal beforehand so you do not feel faint.
3. Breathe slowly while the speculum and catheter are placed. Relaxed muscles mean less discomfort.
4. Tell your doctor in advance if you are very anxious or have found internal examinations very painful before. Extra pain relief can be planned, or an alternative test such as HyCoSy can be discussed.

Is a "Painless HSG" Possible?

No test that fills the womb with fluid is completely free of sensation, but for many women it is mild. If radiation or pain is a particular worry, HyCoSy is an option: it checks the tubes using ultrasound and a special contrast fluid instead of X-rays. Yaal Fertility Centre offers both HSG and HyCoSy, and your doctor will suggest the one that suits your history. An HSG under general anaesthesia is unusual. If a full anaesthetic is needed, doctors usually prefer a laparoscopy with a dye test, which checks the tubes and treats problems in the same sitting.

HSG Test Procedure, Step by Step

When Is It Done?

The test is booked between day 7 and day 10 of your cycle (day 1 is the first day of your period). Your period should have stopped, and ovulation should not have happened yet. This timing makes sure you are not pregnant, and the womb lining is thin, which gives clearer pictures. Avoid unprotected sex from the start of your period until the test.

If your cycles are irregular, call the clinic on the first day of your period so the test can be booked in the right window. If your period is late on the planned day, the test is postponed until pregnancy has been ruled out.

Who Should Not Have an HSG

The test is delayed or swapped for another option if you:

• Might be pregnant.
• Have an active pelvic infection, such as unusual discharge, pelvic pain or fever. The infection is treated first.
• Are bleeding heavily on the planned day.
• Have had a severe reaction to X-ray contrast dye before. HyCoSy, which uses a different contrast fluid, may be suggested instead.

Preparation Checklist: What to Bring

• Your period dates, so the team can confirm the timing.
• Previous reports: earlier scans, HSG or laparoscopy reports, and hormone tests.
• A list of allergies, especially to iodine, contrast dye, latex or medicines.
• A sanitary pad for the dye and spotting afterwards.
• Comfortable clothes and, if you prefer, someone to accompany you home.
• The pain reliever your doctor advised, taken 30 to 60 minutes before your appointment.

What Happens on the Day

1. Before the test: you change into a gown and empty your bladder. Your doctor may give you an antibiotic to prevent infection.
2. Positioning: you lie on the X-ray table with your knees bent, as for a smear test. A speculum is placed and the cervix is cleaned.
3. Catheter: a thin, soft tube is passed through the cervix. A tiny balloon may be inflated to hold it in place.
4. Dye and X-rays: the dye is injected slowly while a few X-ray images are taken on a screen. This is when you feel the cramp.
5. Finish: the catheter is removed and you rest for 15 to 30 minutes.

How Is an HSG Test Done? What the Doctor Watches For

As the dye goes in, the doctor watches it on a screen in real time. First the dye outlines the womb cavity, which should look like a smooth, upside-down triangle. Then it flows into each tube, which shows as a thin line, and finally it spills out of the far ends of the tubes into the pelvis, where it spreads around the bowel and is absorbed harmlessly.

Sometimes you will be asked to turn slightly onto one side so the doctor can see a tube more clearly. If the dye does not enter a tube at first, the doctor may wait a few seconds or inject a little more slowly, because a tube can go into a brief spasm. These few extra moments often make the difference between a false "block" and a clear result.

Why HSG at Yaal Is Done at the Kilpauk Centre

An HSG needs an X-ray room. At Yaal Fertility Centre, the X-ray room is at our Kilpauk centre, so that is where HSG is done. You can have your consultation and other tests at the centre nearest you, and if the ultrasound-based HyCoSy suits you better, your doctor will tell you where it can be scheduled.

How Long Does an HSG Test Take?

The dye and X-ray part takes about 2 to 5 minutes, and the time on the table is usually 10 to 15 minutes. Plan on around 45 minutes to an hour at the clinic in total. Most women go back to normal activity the same day.

After the Test

• Some sticky dye and light spotting for 1 to 2 days is normal. Use a pad, not a tampon.
• Mild cramps settle with rest, warmth and your usual pain reliever.
• Call your doctor if you have fever, worsening pelvic pain, heavy bleeding or a smelly discharge, as these can be signs of infection.

HSG Risks and Side Effects

An HSG is a safe, routine test, and serious problems are uncommon. It helps to know what is normal and what is not.

Infection

The most important risk is a pelvic infection after the test. It is uncommon, but it is more likely in women who have had pelvic infection before or who have a hydrosalpinx. This is why some doctors give an antibiotic, and why fever or worsening pain in the days after the test should always be reported.

Allergy to the Contrast Dye

HSG dye usually contains iodine. Allergic reactions are rare and usually mild, such as itching or a rash. Tell the team beforehand if you have ever reacted to contrast dye during a scan. Having a seafood allergy alone is not usually a reason to avoid the test, but mention it so your doctor can decide.

Radiation

An HSG uses only a few X-ray images, and the dose is small. The test is timed before ovulation so that there is no chance of an early pregnancy being exposed.

Fainting and Spotting

A few women feel light-headed for a short time as the cervix is handled. Light spotting for a day or two is normal and is not a sign of harm.

How to Read Your HSG Report

HSG reports use short medical terms. This table explains the common ones.

Your doctor will explain your own report, because the meaning of each finding depends on your age, your other test results and how long you have been trying to conceive. A filling defect, for example, is usually checked next with an ultrasound or hysteroscopy, since polyps are common and simple to remove. See our guide to uterine polyps and fertility.

HSG After a Miscarriage, C-Section or a Previous Pregnancy

After a Miscarriage or D&C

If you have had a miscarriage or a D&C, your doctor will usually wait until you have had at least one normal period before an HSG. When periods are much lighter after a D&C, an HSG or hysteroscopy can check for scar tissue inside the womb (intrauterine adhesions). If you have had two or more miscarriages, the HSG is usually part of a wider set of tests. See recurrent pregnancy loss: causes and tests.

After a Caesarean Section

An HSG is generally safe after a caesarean, usually once periods have returned and several months have passed since the birth. It can sometimes show a small pouch at the caesarean scar, called a niche or isthmocele, which in some women causes spotting after periods. Your doctor will tell you whether it needs any treatment.

When You Have Secondary Infertility

If you conceived before but are not conceiving now, an HSG is often one of the first tests, because infection or surgery since the last pregnancy can affect the tubes. Read more about secondary infertility.

HSG vs HyCoSy vs Laparoscopy

HSG or HyCoSy: Which Should You Choose?

Both tests answer the main question, whether your tubes are open, and both are done in the first half of the cycle without anaesthesia.

• HyCoSy may suit you better if you want to avoid X-rays, have had a reaction to iodine contrast, or would also like the ovaries and womb checked by ultrasound in the same sitting.
• HSG may suit you better when the doctor needs clear pictures of the whole length of each tube and the shape of the womb cavity, or when an earlier HyCoSy was unclear.

Neither test sees the outside of the tubes or the pelvis. If your history suggests endometriosis or adhesions, a laparoscopy with a dye test gives the full picture and can treat problems at the same time.

What Happens After an HSG? Normal and Abnormal Results

Your doctor usually sees the images during the test, so you often get a first answer the same day.

What Happens After a Normal HSG Test?

A normal HSG means both tubes are open and the womb cavity looks normal. Next steps depend on the rest of your tests:

• If ovulation and your partner's semen analysis are also normal, your doctor may suggest trying naturally for a few more months with well-timed intercourse.
• If you do not ovulate regularly, ovulation induction may be the next step.
• If there is a mild sperm problem or unexplained infertility, IUI is often advised.

A normal HSG is reassuring, but it does not check everything. It cannot show endometriosis outside the womb, egg quality or sperm function. If every test is normal and you are still not pregnant, this is called unexplained infertility, and there are clear next steps for it.

How long to keep trying naturally after a normal HSG depends mostly on your age: younger couples with no other problems may be advised to try for a few more months, while women over 35 are usually encouraged to move to treatment sooner.

Can an HSG Test Increase Your Chance of Pregnancy?

Some studies show a small rise in natural pregnancy rates in the first few months after an HSG, especially when an oil-based dye is used. The likely reason is that the dye flushes out mucus or debris in the tubes. It is a welcome side effect, but the test is not a treatment.

Can an HSG Clear a Blocked Tube?

Sometimes. A blockage close to the womb (a proximal block) can be caused by a spasm of the tube or a plug of mucus, and the dye pressure may clear it. When a block looks proximal, doctors often repeat the test or confirm it with laparoscopy before deciding it is real. A block caused by scar tissue cannot be opened by an HSG.

Next Steps if the HSG Shows Blocked Tubes

• One tube blocked: natural conception or IUI is still possible through the open tube, depending on your age and other results.
• Both tubes blocked: IVF is usually the most effective option, because the egg is collected from the ovary and the embryo is placed straight into the womb, bypassing the tubes.
• Hydrosalpinx (a swollen, fluid-filled tube): the fluid can leak into the womb and lower the chance of an embryo implanting, so removing or clipping the tube is often advised before IVF. See our guide to hydrosalpinx and IVF.
• A problem inside the womb such as a polyp, septum or scar tissue is usually confirmed and treated with hysteroscopy.