Cramps With an IUD: What’s Normal and What Helps

Cramping is one of the most common side effects of an IUD, especially in the first few months. Here’s why it happens, how long it usually lasts with a copper or hormonal IUD, what helps, and which kinds of pain mean you should get checked.

An IUD (intrauterine device) is a small T-shaped birth control device placed inside the uterus. There are two kinds: hormonal IUDs (such as Mirena, Kyleena, Liletta and Skyla), which release a progestin hormone, and the copper IUD (Paragard), which has no hormones. Cramps with an IUD are common. Most women cramp during and after insertion, and many have stronger period cramps for the first three to six months while the uterus gets used to the device. After that, cramps usually settle. With a copper IUD, periods may stay heavier and more painful; with a hormonal IUD, cramps often ease over time. Pain that is severe, getting worse, or still going after about six months is not something to put up with. It needs a check.

Why an IUD causes cramps

• Insertion itself. The cervix is opened and the uterus is measured, which brings strong, period-like cramps for a few hours to a few days.
• The uterus adjusting. The uterus is a muscle, and it contracts around something new inside it. This settles over the first few months for most women.
• Copper and prostaglandins. The copper IUD causes a mild inflammatory reaction in the uterus, which raises prostaglandins, the same chemicals that cause period cramps. That’s why copper IUD periods are often heavier and crampier.
• Irregular bleeding with a hormonal IUD. Spotting and light, unpredictable bleeding in the first months can come with mild cramps between periods.
• A problem with the IUD, such as the device moving out of place. This is less common, and the warning signs are below.

How long IUD cramps usually last

• The first day or two: the strongest cramping, usually eased by pain relief, heat and rest.
• The first few weeks: on-and-off cramps and spotting are common with both types.
• Three to six months: most women’s cramps have settled by now. With a copper IUD, periods are often still heavier and more painful than before, though for many this improves.
• After six months: new cramps, or cramps that never settled, deserve a visit. So does pain that suddenly changes after months of feeling fine.

If you had painful periods before your IUD, the type matters. A hormonal IUD often makes periods lighter and less painful, while a copper IUD can make painful periods worse. If a copper IUD keeps hurting, ask your clinician whether a different method would suit you better; see Birth Control for Period Cramps.

What helps

• Anti-inflammatory pain relievers. Ibuprofen or naproxen work well for IUD cramps because they lower prostaglandins. They work best taken early, at the first sign of a period; see Ibuprofen for Period Cramps. Check with your doctor first if you have stomach ulcers, kidney problems, asthma that worsens with NSAIDs, or take blood thinners.
• Heat on the lower belly or back. A heating pad or warm pack relaxes the muscle; see Heating Pad for Cramps.
• Gentle movement, such as walking or light stretching, often eases cramps more than lying still.
• Warm drinks. See Tea for Period Cramps for teas with some research behind them.
• Rest on the worst days, especially the day of insertion.

How to check your IUD strings

Your IUD has two thin strings that come down through the cervix. Feeling for them once a month, after your period, is a simple way to check the IUD is still in place. Wash your hands, then gently reach into the vagina until you touch the cervix, which feels firm, like the tip of your nose. You should feel the strings but not the hard plastic of the IUD. If you can’t feel the strings, they feel much longer or shorter than before, or you can feel the device itself, use condoms and call your clinician. Never pull on the strings.

When to see a doctor

• Severe pain that pain relievers don’t touch, or cramps that keep getting worse.
• Fever, chills, bad-smelling discharge or pain during sex. These can be signs of a pelvic infection, which is most likely in the first few weeks after insertion.
• Missing, longer or shorter strings, or feeling the IUD itself. The IUD may have moved or come partly out.
• A positive pregnancy test, or a missed period with pain. Pregnancy with an IUD is rare, but when it happens it is more likely to be ectopic. One-sided pain, shoulder pain, dizziness or fainting need emergency care.
• Heavy bleeding: soaking a pad or tampon every hour for a few hours, clots larger than a quarter, or bleeding longer than seven days; see Blood Clots During Your Period.
• Cramps still bad after about six months, or new pain after months of comfort. An IUD can also hide conditions such as adenomyosis, endometriosis or fibroids.

The traditional Chinese medicine view

In Traditional Chinese Medicine, period pain that feels better with warmth, and comes with dark blood or clots and cold hands and feet, is traditionally linked to cold in the uterus. Traditional advice is to keep the lower belly and feet warm, avoid iced drinks during your period, and favor warm, cooked meals. This is a traditional framework, not an established medical mechanism; see Feeling Cold During Your Period.

The CycleCalm herbal pouch follows that tradition and is worn over the navel for familiar monthly cramps and discomfort. It’s not a treatment for IUD pain or any IUD problem. If your pain is new, severe or has changed since your IUD went in, see your clinician first.

Quick answers

Is it normal to have cramps with an IUD?
Yes, especially in the first three to six months. Cramps that are severe, worsening or still there after six months should be checked.

Does a copper IUD cause worse cramps than a hormonal IUD?
Usually, yes. Copper IUDs often make periods heavier and more painful, while hormonal IUDs often make them lighter and less painful over time.

Can cramps push my IUD out?
Ordinary cramps aren’t known to move an IUD. But an IUD that has moved can cause new or stronger pain, which is why changed pain is worth checking.

Why do I have cramps with my IUD but no period?
Hormonal IUDs often make periods very light or stop them, but your body may still cycle, so mild cramps can come at the time a period would have. A pregnancy test is a sensible first step if you’re unsure. If you’re having your IUD taken out, see Your First Period After IUD Removal.

Reviewed October 2026. Author: Qingcai Wang, MD, PhD, developer of the Five Essences external herbal-pouch formulations, with a commercial interest in their sale. General education only; continue your medical care.

Sources: NHS, IUD (coil); NHS, IUS (hormonal coil); ACOG, Long-acting reversible contraception.