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4 Warning Signs of Postpartum Infection Every New Mom Should Know

Written By Marcus Webb, CPT
May 27, 2026
Reviewed by   Noah Miller, PhD
Certified Personal Trainer and sports nutrition enthusiast. I write about fitness, recovery, and the lifestyle habits that keep you feeling your best.
4 Warning Signs of Postpartum Infection Every New Mom Should Know
4 Warning Signs of Postpartum Infection Every New Mom Should Know Source: Pixabay

The weeks after childbirth are a blur of sleepless nights, baby feedings, and physical recovery. It's easy to dismiss a spike in temperature, an odd discharge, or a patch of redness as part of the normal healing process. But your body is working hard to repair itself, and sometimes an infection can take hold quietly. Knowing which symptoms deserve a call to your healthcare provider can make all the difference in your recovery.

Postpartum infections can develop in the uterus, the incision site from a C-section, or even a small vaginal tear. While they're treatable, they can escalate quickly if ignored. Here are four warning signs that should prompt you to reach out for medical help—no second-guessing required.

1. A Fever That Won't Break

A temperature of 100.4°F (38°C) or higher during the first 24 hours after delivery—or any fever that persists beyond that window—is a classic red flag. Postpartum fevers often point to endometritis (inflammation of the uterine lining), a urinary tract infection, or a wound infection. Don't wait for it to climb higher; if the thermometer shows an elevation that doesn't respond to rest or hydration, call your doctor or midwife.

Trust your gut. If you feel feverish but can't get your temperature to register, pay attention to body chills, drenching sweats, or that sense of being 'off.' These sensations matter just as much as a number on a thermometer.

2. Abnormal Lochia or Foul-Smelling Discharge

In the first weeks postpartum, you'll experience lochia—a mix of blood, mucus, and uterine tissue. It's normal for this discharge to start heavy and red, then gradually taper to pinkish-brown and finally yellowish-white. What's not normal is a sudden return to bright red bleeding after it had lightened, or a discharge that smells unpleasant or fishy. A foul odor often indicates a bacterial infection in the uterus or vagina. If you notice a strong smell or an unusual color, or if you're soaking through a pad every hour for more than two hours in a row, seek medical advice.

3. Redness, Swelling, or Pain at a C-Section or Tear Site

Whether you had a C-section or a vaginal delivery with stitches, your incisions should be healing steadily. Watch for these signs of a wound infection: increasing redness that spreads beyond the incision line, warmth when you touch the area, swelling that feels hard or tender, or any oozing of yellow or green pus. Pain that gets worse, not better, is also a clue. If the site feels hot or looks angry, don't try to treat it with at-home remedies—a healthcare provider needs to assess it and may prescribe antibiotics or wound care.

4. Pelvic Pain That Worsens Instead of Improves

Some cramping and soreness are normal as your uterus shrinks back to its pre-pregnancy size. But sharp, persistent pelvic pain—especially if it's located on one side, or if it's accompanied by fever or chills—could mean an infection has spread to your fallopian tubes or ovaries (parametritis). Pain during urination or a constant urge to pee may signal a urinary tract infection. If your discomfort is making it hard to care for yourself or your baby, or if over-the-counter pain relief isn't touching it, that's a sign you need a proper evaluation.


Being a new mom is demanding enough without worrying about complications. The best protection is knowing what's typical and what's not. Write down your questions, trust your instincts, and don't hesitate to call your provider even for what feels like a small concern. Your health is foundational to your baby's well-being.

If you suspect an infection, please reach out to a medical professional. Do not wait for symptoms to become severe. This information is for educational purposes only and is not a substitute for professional medical advice.

Related FAQs
A temperature of 100.4°F (38°C) or higher at any point in the first 24 hours after delivery, or a persistent fever thereafter, is considered a warning sign and should be reported to your healthcare provider.
No, postpartum infections rarely resolve without treatment. They typically require antibiotics or other medical interventions. Ignoring symptoms can lead to serious complications like sepsis, so it's important to seek care promptly.
Normal lochia changes from red to pinkish-brown to yellowish-white over several weeks. You should be concerned if the discharge has a foul or fishy odor, returns to bright red after lightening, or if you are soaking a pad every hour for more than two consecutive hours.
Not all pelvic pain is infection-related, but worsening pain, especially if it's sharp or one-sided, along with fever, chills, or tenderness around the incision, should be evaluated by a doctor to rule out an infection or other complications.
Key Takeaways
  • A fever of 100.4°F or higher postpartum warrants a call to your healthcare provider.
  • Foul-smelling or suddenly heavy lochia can indicate uterine infection.
  • Redness, warmth, or pus at a C-section or tear site signals possible wound infection.
  • Persistent pelvic pain that does not improve may point to infection of the reproductive organs.
  • Prompt medical attention for any of these signs can prevent serious complications.
Medical Note
This article is for informational purposse only and should not be taken asanb caring teotio ongpontyBeotot bacnts Spotiroeprofestional medical loloice. Awwver consux with a healthcart-professenar-tal for medical advice and ineatment.
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About the Author
Marcus Webb, CPT
Fitness & Wellness Coach