Postpartum Warning Signs — When to Call, When to Go In — Evidence Library

What it is

About 1 in 3 US pregnancy-related deaths occur after the first week postpartum, and most are preventable. The most common causes in this window are infection, cardiomyopathy, blood clots (VTE/PE), late preeclampsia, hemorrhage, and suicide. Most of these have a warning sign in the days beforehand — a headache that won't go away, chest pain or shortness of breath, one calf swelling, soaking a pad in an hour, a fever, a feeling that something is very wrong. The CDC's Hear Her campaign gives clinicians and patients a shared list.

Evidence review links

Each link opens the full review on the publisher's site in a new tab.

Possible benefits

A shared checklist makes it easier to insist on being taken seriouslyReview sources ↓
Late preeclampsia is treatable when caught — deadly when missedReview sources ↓
Postpartum VTE risk is highest in the first 6 weeks; early treatment prevents PEReview sources ↓

Possible risks

Symptoms are often written off by providers (and by patients) as 'just tired' or 'just anxious'Review sources ↓
Some warning signs (chest pain, one-sided leg swelling, severe headache with vision changes) need same-day evaluation, not the next available appointmentReview sources ↓

Alternatives

Save your provider's after-hours number in your phone before you give birthReview sources ↓
Take blood pressure at home 2–3x/week for the first 2 weeks if you had any hypertension in pregnancyReview sources ↓
Bring the CDC Hear Her card to appointments and hand it over if you're not being heardReview sources ↓

Usually normal — and when to call

Common examples that surprise or worry many people. Each pairs a plain-language "usually normal" note with concrete signs that deserve a call to your care team. If something feels wrong that isn't listed here, call anyway.

What is normal? →

Bleeding — soaking a pad in an hour, passing large clots, or bleeding turning bright red again after slowing
Within the range of normal
Lochia is heavier for the first few days, tapers, and can briefly increase after activity or the first shower.
Call your healthcare team if
You soak a full maxi pad in an hour for two hours in a row, pass a clot bigger than a lemon, feel lightheaded, or bleeding suddenly turns bright red and heavy after it had slowed.
Headache that won't go away, or vision changes / upper-belly pain
Within the range of normal
Mild sleep-deprivation and dehydration headaches are common.
Call your healthcare team if
A headache doesn't respond to fluids and acetaminophen within a few hours, you see spots/blurring, you have pain under your right ribs, or your blood pressure is 140/90 or higher — go in, not the phone. Late postpartum preeclampsia can strike up to 6 weeks after birth.
Chest pain, shortness of breath, or fast heartbeat at rest
Within the range of normal
Being winded going up stairs in the first weeks with anemia is common.
Call your healthcare team if
Chest pain, trouble breathing lying flat, coughing up pink froth, or a resting heart rate above 110 — 911 or ER. This can be postpartum cardiomyopathy or a pulmonary embolism.
One calf red, warm, swollen, or painful
Within the range of normal
Some ankle/foot swelling from pregnancy fluid takes 1–2 weeks to resolve, usually symmetric.
Call your healthcare team if
Swelling, warmth, or pain in ONE calf — same day, in person. Postpartum is a high-risk window for DVT.
Fever over 100.4°F (38°C), chills, foul-smelling discharge, or wound redness
Within the range of normal
Milk 'coming in' can cause a low-grade warmth for a day.
Call your healthcare team if
Fever ≥100.4°F, foul discharge, red streaks around a c-section incision or perineal repair, or one breast painful, red, and warm — call same day. Postpartum endometritis, wound infection, and mastitis all need treatment.
Thoughts of harming yourself or the baby, or feeling disconnected from reality
Within the range of normal
Fleeting intrusive thoughts ("what if I dropped the baby") that upset you are common with postpartum OCD and are treatable.
Call your healthcare team if
You are making a plan, hearing voices, feeling paranoid, or not sleeping at all — same-day help. Call PSI (1-800-944-4773), 988, or go to the ER. Postpartum psychosis is an emergency.

Educational reassurance only — never a substitute for your care team's advice. When in doubt, call.

Current evidence

Source: CDC Hear Her campaign, CDC Maternal Mortality Review Committee (MMRC) data, ACOG Committee Opinion 736 (Optimizing Postpartum Care), and the AIM (Alliance for Innovation on Maternal Health) safety bundles on hemorrhage, hypertension, and VTE.

Where the evidence is clear · where people may choose differently

For most topics, guidelines from ACOG, WHO, and other major bodies broadly agree on the core safety points (when to act in an emergency, informed-consent standards, monitoring baselines). Where reasonable people — and even guidelines — differ tends to be around thresholds (when to start or stop something), preferences (comfort, environment, support), and values (how you weigh small risks against benefits). Use the questions below to explore those pieces with your care team.

Educational only. Your care team can help you weigh what applies to your specific situation.

Bleeding — soaking a pad in an hour, passing large clots, or bleeding turning bright red again after slowing

Headache that won't go away, or vision changes / upper-belly pain

Chest pain, shortness of breath, or fast heartbeat at rest

One calf red, warm, swollen, or painful

Fever over 100.4°F (38°C), chills, foul-smelling discharge, or wound redness

Thoughts of harming yourself or the baby, or feeling disconnected from reality