I am a reproductive‑age woman with an intrauterine device (IUD) experiencing sharp stabbing back pain and severe cramp‑like abdominal/pelvic pain suggestive of infection; could this be IUD displacement or pelvic infection, and should I seek urgent medical care?

Seek Urgent Medical Care Immediately—Your Symptoms Suggest Possible IUD Malposition or Pelvic Infection

You need to see a healthcare provider urgently, ideally today or tomorrow, because sharp stabbing back pain combined with severe cramping and suspected infection with an IUD in place can indicate serious complications including IUD malposition, uterine perforation, or pelvic inflammatory disease. 1, 2

Why This Is Urgent

Your combination of symptoms is concerning for two potentially serious conditions:

• IUD malposition or perforation: Sharp stabbing pain (especially radiating to the back) with severe cramping suggests the IUD may have moved from its proper position in the uterine cavity into the uterine muscle wall or beyond 2
• Pelvic infection: The sensation of infection with strong cramps raises concern for pelvic inflammatory disease (PID), which accounts for 20% of acute pelvic pain cases and can include endometritis, salpingitis, or tubo-ovarian abscess 3
• Combined risk: Research shows that 75% of patients with abnormally positioned IUDs present with pain or bleeding, and these symptoms improve after IUD removal in 95% of cases 2

What You Should Do Right Now

Immediate Actions (Before Your Appointment)

Pain management while awaiting evaluation:

• Take naproxen 500-550 mg every 12 hours with food (or ibuprofen 600-800 mg every 6-8 hours) on a scheduled basis, not just when pain is severe 1, 4
• Apply a heating pad to your lower abdomen or back to help with cramping 1, 4
• Try acupressure at the LI4 point (the webbing between your thumb and index finger) or SP6 point (about 3 finger-widths above your inner ankle bone) for several minutes on both sides 1, 4

Do NOT delay seeking care even if pain medications provide temporary relief—the underlying problem needs evaluation 1

What Your Healthcare Provider Needs to Check

Your provider should perform:

1. Speculum examination to check if IUD strings are visible at the cervical opening 1
2. Pelvic examination to assess for tenderness suggesting infection (cervical motion tenderness, adnexal tenderness, uterine tenderness) 5, 6
3. Ultrasound imaging (specifically 3D coronal view if available) to determine exact IUD position—standard 2D ultrasound often misses malpositioned devices 2
4. Testing for sexually transmitted infections (chlamydia and gonorrhea) if infection is suspected 6

What Treatment You Should Expect

If the IUD Is Malpositioned

The definitive treatment is IUD removal, which resolves symptoms in the vast majority of patients 1, 2:

• The IUD should be removed immediately by gently pulling on the strings if visible 1
• Do not delay removal in symptomatic patients—evidence shows higher symptom resolution rates with removal compared to waiting 1
• If strings are not visible, imaging is needed to locate the device before removal 2
• A malpositioned IUD does not provide contraceptive protection 7

If Pelvic Infection Is Present

Treatment approach depends on severity 6:

• Mild to moderate PID: Start appropriate antibiotics immediately; the IUD does not need to be removed during treatment unless you request it or there's no improvement after 72 hours 6
• Severe PID: Consider IUD removal after starting antibiotics 6
• Complete evaluation is essential to exclude abscess formation or ectopic pregnancy 5

Critical Warning Signs

Go to the emergency department immediately if you develop 7, 8:

• Fever (temperature >38°C/100.4°F)
• Severe, worsening, or unilateral pain
• Nausea and vomiting
• Inability to tolerate oral medications
• Signs of shock (dizziness, fainting, rapid heartbeat)

Important Context About Your Symptoms

• Stabbing back pain is NOT normal with a properly positioned IUD—this suggests the device may have perforated through the uterine wall 8, 2
• Infection risk is highest in the first 20 days after insertion but can occur at any time, especially with device malposition 6
• Uterine perforation occurs in 0.12-0.68 per 1,000 insertions and can cause serious complications including bowel injury if not addressed 7, 8
• The fact that you can feel "infection somewhere" combined with severe cramping makes this a time-sensitive situation requiring evaluation within 24-48 hours maximum 3, 5

Bottom line: Contact your gynecologist or go to urgent care today. Do not wait to see if symptoms improve on their own.