Periods & cycle

Hysteroscopy: A Look Inside the Uterus

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A hysteroscopy uses a thin, lighted camera passed through the cervix to see inside the uterus, usually to investigate heavy or irregular bleeding or to remove a polyp. It can be done awake in an office or asleep in an operating room. Many feel period-like cramping; some find the office version painful.

Last updated: July 2026

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What is a hysteroscopy and why is it done?

A hysteroscopy lets a clinician see the inside of the uterine cavity directly, rather than inferring its shape from an outside scan. A slim telescope, often only 3 to 5 mm wide, passes through the vagina and cervix while fluid or gas gently opens the cavity for a clear view. According to NICE guidance on heavy menstrual bleeding, hysteroscopy is used when imaging suggests a polyp, a fibroid pressing into the cavity, or a lining problem behind heavy menstrual bleeding 1. It also helps explain bleeding between periods and, in people past menopause, evaluates bleeding that needs a cause identified 2. Small polyps can often be removed in the same session.

Office or operating room: what is the difference?

Hysteroscopy happens in two main settings, and the choice shapes the experience. An office, or outpatient, hysteroscopy is done while you are awake, usually takes about 10 to 20 minutes, and usually lets you head home within 30 minutes. A hospital hysteroscopy under general or regional anesthesia suits longer procedures, larger growths, or anyone who would find an awake exam too uncomfortable. According to NICE, an outpatient approach is offered first for many people because it avoids anesthesia and speeds recovery, with the operating-room option kept available on request or when it is clinically needed 1. Both use the same basic camera; the setting mainly changes anesthesia, timing, and cost. Many clinics now perform most diagnostic hysteroscopies in the office, reserving the operating room for treatment that needs more time or deeper anesthesia.

Does a hysteroscopy hurt, and how bad is it?

Pain during hysteroscopy varies widely, and honest expectations help. Many people describe cramping similar to a strong period that eases within 10 to 15 minutes; a minority find an office procedure painful enough that pausing or switching to anesthesia is the right call 1. According to NICE, clinicians should discuss pain-relief choices in advance and let you halt the procedure at any time 1. Factors like never having given birth, anxiety, or a tight cervix can make the exam more uncomfortable. Over-the-counter pain relief taken about 1 hour beforehand, slow breathing, and a clinician who talks you through each step all tend to help, and you can ask about numbing the cervix. Telling the team about past painful exams lets them plan extra numbing or a slower, calmer pace.

What can a hysteroscopy find that a scan cannot?

A direct view catches things that imaging can under-read. According to comparative evidence on uterine fibroids, small polyps and submucosal fibroids, sometimes just 5 to 10 mm across, that bulge into the cavity can hide on a standard ultrasound but show clearly on hysteroscopy 3. The camera also lets the clinician take a targeted biopsy of a suspicious area and remove a polyp in one visit, which a scan cannot do. This matters most when an ultrasound of the uterus is normal but irregular bleeding keeps returning, or when the lining looks thickened and needs sampling. In older adults, ruling a cause in or out carries added weight because the risk of a lining cancer rises after menopause 2.

When to see a gynecologist

A gynecologist most often performs hysteroscopy and can weigh whether the office or operating-room route fits your anatomy, history, and comfort. Because this procedure sits beyond routine primary care, a referral to a gynecologist or a specialist clinic is the usual path when imaging or bleeding calls for a look inside. Fever, heavy bleeding, or severe pain in the days after a hysteroscopy is uncommon and deserves prompt review rather than waiting. Knowing in advance whether the plan is diagnostic only or may include removing a polyp helps you weigh the office and hospital options. Gale can help you write down your questions about pain relief and recovery before the appointment.

Common questions

It depends on the setting. An office hysteroscopy is done while you are awake, sometimes with local numbing of the cervix. A hospital procedure can use general or regional anesthesia so you feel nothing. The choice depends on what needs to be done, your comfort, and your health history.

Most people go back to normal activity the same or next day after a diagnostic hysteroscopy. Light spotting and period-like cramps for a few days are common. Recovery is a bit longer if a larger growth was removed or if anesthesia was used, and the clinic will give specific guidance.

Often yes. Many small polyps can be seen and removed in a single hysteroscopy, which is one advantage over imaging alone. Larger growths may need a planned procedure in an operating room. The clinician will explain what can be done in one visit versus what may need a return.

They are related but not identical. A hysteroscopy uses a camera to see inside the uterus and can guide targeted removal or biopsy. A D&C, or dilation and curettage, scrapes or suctions the lining, sometimes without direct visualization. The two are often combined so the clinician can both see and sample.

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After a hysteroscopy: when to call

  • —A fever, chills, or foul-smelling discharge in the days after a hysteroscopy is a reason to seek prompt clinician review
  • —Heavy bleeding that soaks a pad every hour is a reason to seek urgent medical care
  • —Severe or worsening pelvic pain not eased by usual pain relief is a reason to contact your clinician promptly
  • —Bleeding after menopause, before or after any procedure, is a reason to arrange a clinician review

Heavy bleeding that soaks a pad an hour, fainting, or severe pain with a fever can signal a serious problem — call 911 or go to the nearest emergency room right away.

This article is general health education, not medical advice. Whether a hysteroscopy is right for you, and which setting fits, should be decided with a gynecologist who knows your history.

References

  1. 1.National Institute for Health and Care Excellence (2026). Heavy menstrual bleeding: assessment and management (NG88). National Institute for Health and Care Excellence (NICE). link ✓Guidance that hysteroscopy is used to investigate heavy menstrual bleeding, that an outpatient (awake) approach is offered first for many, and that pain-relief options and the ability to stop should be discussed
  2. 2.National Cancer Institute (PDQ Adult Treatment Editorial Board) (2020). Endometrial Cancer Treatment (PDQ®)–Patient Version. National Cancer Institute (NCI), NIH. link ✓Patient-facing reference that bleeding after menopause needs evaluation and that hysteroscopy and biopsy help assess the endometrium when a lining cancer is a concern
  3. 3.Hartmann KE, Fonnesbeck C, Surawicz T, Krishnaswami S, Andrews JC, Wilson JE, Velez-Edwards D, Kugley S, Sathe NA (2017). Management of Uterine Fibroids (Comparative Effectiveness Review No. 195). Agency for Healthcare Research and Quality (AHRQ). PMID 30789683 ✓Comparative effectiveness review noting that submucosal fibroids and small intracavitary lesions may be better characterized by hysteroscopy than by transabdominal ultrasound

3 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — every citation independently verified. Editorial policy

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