IUD-Related Bleeding

Expected bleeding patterns

Lower-dose hormonal IUDs cause more ongoing irregular spotting and are less likely to stop periods than the higher-dose type.

Why IUDs cause bleeding

• Hormonal IUDs thin the lining of the uterus. While it adjusts, the thin lining is fragile and sheds unpredictably, causing spotting. Once thinned, there is little to shed, so periods lighten or stop.
• Copper IUDs cause a local inflammatory reaction in the uterus that prevents pregnancy. This increases blood flow and prostaglandins, making periods heavier (menorrhagia) and more painful.

When bleeding may not be from the IUD

Bleeding that is unusual for you, or new after months of a settled pattern, should be checked for other causes:

• Pregnancy, including ectopic pregnancy. Pregnancy with an IUD is rare, but when it happens a higher proportion are ectopic
• Infection: chlamydia or gonorrhea, or pelvic inflammatory disease, most likely in the first 3 weeks after insertion
• IUD displacement: partial expulsion or, rarely, perforation of the uterus
• Cervical or endometrial polyps, fibroids
• Hormonal factors: thyroid problems
• Missed cervical screening or cervical changes
• Endometrial hyperplasia or cancer, more relevant over age 45 or with risk factors

How doctors assess IUD bleeding

• questions about timing, type of IUD and how bleeding has changed
• pregnancy test
• pelvic exam to check the strings and cervix
• swabs for STIs
• ultrasound to check the IUD position and look for fibroids or polyps
• cervical screening if due
• blood count for anemia if bleeding is heavy

Treatment

Waiting it out

Most spotting improves within 3 to 6 months. Keeping a bleeding diary helps you and your doctor see the trend. Persistent heavy bleeding is assessed like other abnormal uterine bleeding.

Hormonal IUD spotting

Options for bothersome bleeding include:

• NSAIDs such as ibuprofen or naproxen for 5 to 7 days during bleeding. Follow the label or your doctor's advice.
• A short course of combined hormonal pills, if suitable for you, to stabilize the lining.
• A short course of a progestogen.

Copper IUD heavy periods

• NSAIDs started at the onset of bleeding reduce flow and cramping.
• Tranexamic acid during heavy days.
• Switching to a hormonal IUD, which usually makes periods much lighter.

When to remove or change the IUD

If bleeding remains unacceptable after trying these options, or a problem such as displacement is found, the IUD can be removed or replaced with a different method. Fertility returns quickly after removal.

Frequently asked questions

Is it normal to bleed after IUD insertion?

Yes. Light bleeding and cramping are normal for a few days after insertion. Irregular spotting is common for 3 to 6 months with hormonal IUDs, and heavier periods are common with copper IUDs. It usually improves with time.

How long does IUD spotting last?

For most people with a hormonal IUD, spotting settles within 3 to 6 months. Some have occasional spotting for longer, especially with lower-dose devices. If spotting is still bothering you after 6 months, talk to your doctor.

Does the copper IUD make periods heavier?

Often, yes. Copper IUDs commonly cause heavier, longer and more painful periods, particularly in the first year. NSAIDs taken during periods can reduce bleeding and cramps. If heavy bleeding continues, a hormonal IUD may suit you better.

When should I worry about bleeding with an IUD?

Seek care if you have bleeding with fever, pelvic pain, unusual discharge, a positive pregnancy test, very heavy bleeding with dizziness, missing or changed strings, or new bleeding after months of a stable pattern.

Can an IUD cause bleeding after sex?

Occasionally, but bleeding after sex should be checked. It can come from cervical changes, infection, polyps, or an IUD that has partly moved. A pelvic exam, swabs and sometimes an ultrasound help find the cause.