Signs of Internal Infection After C-Section
Watching for signs of a skin infection after your c-section is the easy part. Redness, blisters, crusty scabs: those are all right there on the surface and simple to check.
Internal infections are the trickier ones, mama. The symptoms can look like anything from a bad case of the flu to heavier bleeding, and they often show up once you're already home from the hospital.
The good news is that most c-section infections, between 3 and 15% of them, are treatable when caught early (NCBI/PMC). So we've pulled together the warning signs to watch for, what the most common infections look like, and how treatment usually goes.
Here's the golden rule to keep in your back pocket:
You should feel a little better and bleed a little less every day after your c-section. If you start to feel worse instead of better, call your provider. It's always better to ask.
What are the signs of an infected c-section?
Most internal c-section infections appear between 4 and 7 days after surgery, which is usually after you've gone home (NCBI/PMC). ACOG lists the main red flags as fever, chills, heavy bleeding, worsening pain, and drainage or leakage from the incision (ACOG). If any show up, call your provider right away.
Here's the full list worth keeping close while you heal. Most of these overlap, and more than one often shows up together.
Fever of 100.4°F or higher
A postpartum temperature of 100.4°F (38°C) or higher is the classic sign of infection and needs urgent attention (ACOG). Check your temperature any time you feel off, not just when you feel hot.
Flu-like symptoms
Chills, shakiness, body aches, nausea, vomiting, dizziness, or that bone-deep tired feeling can all be early infection signals. Postpartum is tiring on its own, we know. But if it feels like the flu, treat it like infection until your provider says otherwise.
Worsening abdominal pain
Your incisional pain should ease a little each day. Call your provider if pain suddenly gets worse after days of improving, stops responding to your usual relief, or is so bad you can't move or concentrate. Our guide to pain after a c-section walks through what's normal week by week.
Fresh, bright-red bleeding from the incision
Bright red blood from the actual incision, especially after it had scabbed, can mean your c-section is opening. Cover it with clean gauze and call your provider or head to the ER.
Foul-smelling vaginal discharge
Normal lochia has a mild, metallic smell. If it turns fishy or truly foul, that often means an internal bacterial infection such as endometritis (Mayo Clinic). Any change in odor is worth a phone call.
Abnormal vaginal bleeding
Some bleeding after birth is expected for 4 to 6 weeks, and it should slowly taper. Contact your provider if any of these show up:
- Bleeding suddenly increases instead of decreasing
- You soak more than one sanitary pad per hour
- You pass clots larger than a plum or golf ball
- The color turns bright red again after it had turned brown
Problems with urination
A urinary tract infection is common after a cesarean because of the catheter used during surgery. Red flags include burning when you pee, needing to go very often, blood in your urine, or cloudy, strong-smelling urine.
Pus draining from the incision
Pus is thick white or yellow fluid from the wound. If it starts oozing from your incision, your body is actively fighting infection and you need antibiotics. Cover the area loosely with clean gauze and call your provider the same day.
Spreading redness and swelling
Mild redness and swelling right at the scar are normal in the first week. It becomes a red flag if the redness spreads outward across your belly, feels warm to the touch, or the area changes color (red, purple, or brown depending on your skin tone) (Mayo Clinic).
What should you do if you think you have a c-section infection?
Call your provider. Today. Don't wait for the next scheduled visit.
Internal c-section infections do not heal on their own, and the sooner you get antibiotics or other treatment, the faster you'll recover. If you can't reach your OB, call your hospital's labor-and-delivery line or head to the ER, especially if you have a fever, heavy bleeding, or severe pain.
Untreated postpartum infection can progress to sepsis, a life-threatening body-wide response. Sepsis happens in roughly 0.84% of cesarean deliveries (NCBI/PMC). That number is low, but the reason it stays low is that mothers and their providers take warning signs seriously and treat early.
One more thing worth tucking away, mama: you are not being dramatic by calling. Nurses and OBs on call would far rather reassure you than miss a real problem. It's one of those "better to ask" situations.
What are the four most common c-section wound infections?
The four most common types, according to Mayo Clinic, are impetigo, cellulitis, abscess, and endometritis (Mayo Clinic). Three of them live on or just under the skin. Endometritis is deeper, inside the uterus, and is the one most likely to show up as a fever with foul-smelling discharge rather than anything visible on the scar.
Impetigo
A bacterial skin infection that usually sits right around the incision. Shallow blisters pop and then crust over in a honey-colored scab. It's itchy but rarely serious when treated.
Cellulitis
An infection of the deeper layers of skin and tissue. You'll see spreading redness, feel warmth, and notice swelling and tenderness well beyond the incision line. It needs oral or IV antibiotics.
Abscess
A pus-filled pocket that forms under the skin or deeper in the abdomen. Signs include sharp localized pain, tenderness, redness, swelling, and sometimes pus leaking from the wound site. Abscesses usually need both antibiotics and surgical drainage.
Endometritis
An infection inside the uterus itself. The telltale trio is fever, lower abdominal pain, and foul-smelling vaginal discharge. Risk is around 1.5% after a planned cesarean and up to 7% if labor had already started (NCBI/Bookshelf). Both respond well to IV antibiotics caught early.
How are c-section infections treated?
Most surface infections and endometritis are treated with antibiotics, either orally or by IV depending on how far the infection has spread (Mayo Clinic). IV antibiotics usually mean a short hospital readmission, which feels scary with a newborn at home. Ask about rooming-in so your baby can stay with you.
Abscesses are trickier because antibiotics can't always reach them. Treatment usually means a trip back to the OR, where a surgeon:
- Reopens the wound and drains the pus
- Removes any dead tissue
- Cleans the area and packs it with antiseptic gauze
Depending on the size of the wound, you may need several days of daily cleaning and dressing changes before the wound is closed back up or allowed to heal on its own. This sounds intense, mama. It usually isn't as bad as it reads on paper, and treatment outcomes are very good when infections are caught early.
How common are infections after a c-section?
Between 3 and 15% of women develop some type of c-section infection (NCBI/PMC). Most are surface wound infections that clear with a short course of antibiotics and cause no lasting problems.
Endometritis is less common than surface infection. Rates are around 1.5% for scheduled cesareans and up to 7% when labor has already begun before surgery (NCBI/Bookshelf). Abscess is the rarest of the four, at under 1%.
Routine prophylactic antibiotics given just before incision have dramatically reduced these numbers. Virtually all U.S. hospitals now follow this standard, which is part of why severe post-cesarean infections keep declining.
What are the risk factors for c-section infection?
You can't fully predict who will develop a postpartum infection. But certain factors raise the odds, and if any apply to you, watch yourself extra closely and feel empowered to call your provider at the first warning sign.
Known risk factors include (NCBI/PMC):
- Diabetes (type 1, type 2, or gestational)
- Obesity
- Smoking
- Very young or older maternal age
- Immunosuppressive medication
- Multiple prior c-sections
- Penicillin allergy (so prophylaxis choices are limited)
- Hypertensive disorders of pregnancy
- Twin or triplet pregnancy
- Early rupture of membranes
- Many vaginal exams during labor
- A trial of labor ending in cesarean
- Prolonged labor
- Use of internal fetal monitoring
- Hysterectomy performed during cesarean
- Surgery lasting over an hour
- Blood loss requiring transfusion
- No prophylactic antibiotics given
Note that none of these guarantee an infection. They just shift the odds a little, which is useful to know so you can advocate for good wound care and low threshold for calling your provider.
How can you prevent a c-section infection?
Prevention happens in two windows: before surgery (mostly clinical) and after surgery (mostly daily habits). The CDC's infection-prevention guidance, combined with ACOG practice, makes this pretty straightforward (CDC, ACOG).
Before your c-section
- Don't shave your belly at home. If hair needs to be removed, the surgical team uses clippers.
- Ask the team to confirm prophylactic antibiotics within 60 minutes before incision, which is the CDC-recommended window (CDC).
- Wash with the antibacterial soap your hospital provides the night before or the morning of surgery.
- If you have diabetes, tight blood-sugar control before and after surgery meaningfully lowers infection risk.
- Reduce or quit smoking in the weeks before delivery if you can.
- Stay well hydrated and nourished.
After your c-section
- Follow your wound-care instructions exactly as written.
- Keep the incision clean and dry.
- Change dressings as directed and inspect the wound daily for redness, pus, or swelling.
- Take showers, not baths, for the first 3 weeks.
- Skip oils, perfumes, and heavy lotions on the incision. Gentle baby-safe soap is best.
- Dry the wound thoroughly after showering; a hairdryer on cool works well, and patting with a clean towel is fine.
- If you're plus-sized or have skin folds, extra attention to keeping the wound dry makes a real difference.
- Wear loose, breathable clothes and cotton underwear.
- Don't lift anything heavier than your baby for 6 weeks.
- Hold off on driving, sex, strenuous exercise, bending, swimming, and hot tubs until your provider clears you.
- Don't insert anything into your vagina (tampons, toys) until you're fully healed.
- Don't scratch the wound. If your c-section scar is itchy, ice packs wrapped in a clean cloth and provider-approved silicone sheets both help.
- Take your temperature any time you feel off. It takes 30 seconds and can catch infection early.
When should you call your provider or 911?
Call your OB or labor-and-delivery line today if you notice any of the warning signs above, especially a fever of 100.4°F or higher, foul-smelling discharge, pus, spreading redness, fresh red bleeding from the incision, or pain that's worse than yesterday (ACOG).
Dial 911 (or go straight to the ER) if you are:
- Soaking more than one pad an hour for two hours in a row
- Passing multiple plum-sized clots
- Feeling faint, confused, or struggling to breathe
- Seeing a hard, spreading bruise or dark discoloration across your belly
- Feeling a sudden gush with severe pain
Postpartum sepsis moves fast, and early treatment makes all the difference. Better to arrive at the ER and be reassured than to wait and wonder, mama.
Final thoughts
Most c-section infections are caught early and clear up with a straightforward course of antibiotics. Even the more serious ones usually resolve well when treated promptly. That's the part worth holding onto while you heal.
Keep the golden rule in mind: you should feel a little better every day. If today feels worse than yesterday, or something just feels off, call your provider. You know your body. Trust what it's telling you, mama, and use that trust as your permission slip to pick up the phone.
For more on what recovery should actually look like, our guides to how long you bleed after a c-section, pain after a c-section, and how to tell if your c-section has opened inside walk through what's normal and what isn't, day by day.
This article is for informational purposes only and is not a substitute for professional medical advice. If you suspect an infection or any other complication after your c-section, call your healthcare provider, obstetrician, or midwife right away, or go to your nearest emergency department.
