Gynecologic Conditions
Adenomyosis: Symptoms, Diagnosis and Treatment
Adenomyosis is a noncancerous condition where tissue that normally lines the uterus grows into the uterus's muscle wall. It typically causes heavy periods, hard cramps and a uterus that feels enlarged or tender. Treatment runs from pain relievers and hormonal medicine all the way to hysterectomy, which is the only permanent cure.
It's also one of the most underdiagnosed causes of bad periods. The symptoms overlap with fibroids and endometriosis, and a lot of people spend years assuming that bleeding through their clothes and losing a day of work every month is just how periods are. It isn't, and you don't have to live with it.
What's actually going on in the uterus
Your uterus has two main layers: the inner lining (endometrium), which sheds as your period, and a thick muscle wall (myometrium). In adenomyosis, lining tissue burrows into that muscle. It still reacts to your hormones every cycle, so the wall swells and bleeds a little from the inside. That leads to:
- A thicker, swollen uterine wall
- A uterus that feels enlarged, soft ("boggy") or tender on exam
- Heavier bleeding and stronger cramps
It can be diffuse (spread through much of the wall) or focal (in one spot). A focal lump is sometimes called an adenomyoma, and on a scan it can look a lot like a fibroid.
What are the symptoms of adenomyosis?
Some people have no symptoms at all and find out by accident on an ultrasound. When it does cause trouble, the usual list is:
- Heavy menstrual bleeding, sometimes with large clots
- Painful periods that tend to get worse over the years
- Long periods
- Pelvic pain or pressure that hangs around outside your period
- Pain during sex, often deep rather than at the opening
- A swollen or tender lower belly (some people say their jeans fit differently the week of their period)
- Bleeding between periods
A common worry is "Am I being dramatic?" A practical test: if you plan your week around your period, double up on pads and tampons, or carry a change of clothes, that's heavy enough to bring up.
Months or years of heavy bleeding can also drain your iron. If you're tired all the time, winded on the subway stairs, or craving ice, ask for a blood count and ferritin. Our guide to heavy periods and anemia explains what those numbers mean.
Who gets adenomyosis?
It's most often diagnosed in people in their 40s and 50s who have had children, but it's being found in younger people more often now that imaging is better. Things linked with a higher chance include:
- Prior pregnancies
- Previous uterine surgery, such as a cesarean birth or fibroid removal
- Having endometriosis or fibroids
Nobody knows the exact cause. Symptoms usually fade after menopause, when estrogen drops.
Adenomyosis vs. endometriosis vs. fibroids
These three get mixed up constantly, and you can have more than one at once.
| Adenomyosis | Endometriosis | Uterine fibroids | |
|---|---|---|---|
| What it is | Lining-like tissue inside the uterine muscle | Lining-like tissue outside the uterus | Benign muscle tumors of the uterus |
| Typical symptoms | Heavy, painful periods; enlarged uterus | Pelvic pain, painful periods, pain with sex, infertility | Heavy periods, pelvic pressure, frequent urination |
| How it's usually found | Ultrasound or MRI | Symptoms, imaging, laparoscopy | Pelvic exam, ultrasound |
| Permanent cure | Hysterectomy | No guaranteed cure | Hysterectomy; other options remove or shrink fibroids |
Our guides to endometriosis and uterine fibroids go deeper on each.
How is adenomyosis diagnosed?
Not long ago, the only way to confirm it was to examine the uterus after a hysterectomy. Now imaging can usually point to it.
The pelvic exam. Your clinician may feel a uterus that's bigger, softer or more tender than expected. It's a normal bimanual exam (two fingers inside, a hand pressing on your belly). If it hurts, say so. That's useful information, not something to push through.
Transvaginal ultrasound. Usually the first test. A slim probe goes in the vagina for a closer look at the uterine wall. It feels like pressure more than pain, and it's often done at an imaging center rather than the office. Certain patterns in the muscle (a thickened, uneven wall, small cysts) suggest adenomyosis.
MRI. Ordered when the ultrasound is unclear, especially if it's hard to tell adenomyosis from fibroids. Expect 30 to 45 minutes lying still in a loud tube. Insurers often want prior authorization, so a wait of a week or two is normal.
Depending on your age and symptoms, you may also get a pregnancy test, blood count, thyroid test or an endometrial biopsy to rule out other causes of heavy or irregular bleeding.
Tip: track your bleeding and pain for two or three cycles before the visit. Note how many pads or tampons you use on your heaviest day, any clots bigger than a quarter, and which days you missed work or school. A phone note is fine. It turns "my periods are bad" into something your clinician can act on.
How is adenomyosis treated?
The right plan depends on how much it's disrupting your life, your age, and whether you want a pregnancy in the future.
Medicines for pain and bleeding
- NSAIDs such as ibuprofen or naproxen can ease cramps and may cut bleeding when started at the beginning of your period. Starting early, before the cramps peak, tends to work better than waiting.
- Tranexamic acid is a non-hormonal pill taken only on period days to reduce heavy bleeding.
Ask your clinician which medicine and dose fit you, especially if you have stomach, kidney or clotting issues.
Hormonal treatments
- Levonorgestrel IUD (hormonal IUD). Often very effective for both bleeding and pain, and it can stay in for years. Expect some irregular spotting for the first few months while it settles in.
- Birth control pills, patch or ring, sometimes taken continuously to lighten or stop periods.
- Progestin-only pills, shot or implant.
- GnRH-based medicines, which lower estrogen. They're usually used short-term or paired with "add-back" hormones because of hot flashes and other menopause-like side effects.
Hormones control symptoms but don't remove adenomyosis. If you stop, symptoms often come back.
Procedures and surgery
- Hysterectomy removes the uterus and is the only definitive treatment. It ends periods and the ability to carry a pregnancy. Ovaries can often be kept. See our guides to hysterectomy types and the recovery timeline.
- Uterine artery embolization (UFE) and endometrial ablation are sometimes used, but results for adenomyosis are less predictable than for fibroids or simple heavy bleeding. Ask whether either makes sense in your case.
- Removing a focal adenomyoma is an option for some people who want to keep their uterus. It's less common and doesn't work for diffuse disease.
Can you get pregnant with adenomyosis?
Many people with adenomyosis get pregnant. Some research links it with fertility challenges and certain pregnancy complications, but the evidence is still developing. If a pregnancy is in your plans, tell your OB/GYN before you pick a treatment, because some options (like hysterectomy) close that door.
Questions to bring to your appointment
- Could this be adenomyosis, fibroids, endometriosis, or a mix?
- Is an ultrasound enough, or do I need an MRI?
- Which treatments still allow a future pregnancy?
- How long can I safely stay on hormonal treatment?
- Can you check my iron and blood count today?
- If I choose a hysterectomy, can my ovaries stay?
When to see a doctor
Book an appointment with a gynecologist if you:
- Soak through a pad or tampon every hour for several hours in a row
- Have periods lasting more than seven days
- Have cramps that keep you from normal activities or are getting worse
- Feel pelvic pressure or notice your lower belly is enlarged
- Feel very tired, short of breath or dizzy, which can signal anemia
- Have pain during sex
Get urgent care if bleeding is so heavy you feel faint, or if you have sudden, severe pelvic pain.
Finding care for adenomyosis in New York
A general gynecologist can diagnose and treat most adenomyosis. If you're leaning toward surgery, look for a surgeon who does minimally invasive (laparoscopic or robotic) hysterectomy, which usually means a shorter hospital stay and a faster return to work. Start with gynecologists in Manhattan or Brooklyn, or use our provider search to filter by borough, county and insurance anywhere from Staten Island to Dutchess County.
Frequently asked questions
What does adenomyosis pain feel like?
Most people describe a deep, cramping or pressing pain low in the belly or pelvis that's worst during their period. Some also feel heaviness in the pelvis, pain during sex, or pain that spreads into the lower back.
Is adenomyosis the same as endometriosis?
No. In adenomyosis, tissue like the uterine lining grows into the muscle wall of the uterus. In endometriosis, similar tissue grows outside the uterus. The symptoms overlap, and some people have both.
Can adenomyosis be cured without a hysterectomy?
Hysterectomy is the only treatment that removes adenomyosis completely. Many people keep their symptoms well controlled with a hormonal IUD, birth control pills or other medicines instead.
Is adenomyosis cancer?
No. Adenomyosis is a benign (noncancerous) condition.
Sources
- ACOG — Heavy Menstrual Bleeding (Patient FAQ)
- ACOG — Dysmenorrhea: Painful Periods (Patient FAQ)
- MedlinePlus — Adenomyosis
- NIH, National Library of Medicine — Adenomyosis (StatPearls)
This article is for general education and is not medical advice. It does not replace an evaluation by a licensed clinician who knows your history. If you think you have a medical emergency, call 911.