The signs something's infected after birth: what's normal and what's not
- 3 days ago
- 4 min read
Redness, a smell, a fever, blood clots: here's when "normal healing" becomes "get it checked"
Recovering from birth involves a lot of healing at once. A caesarean scar. A perineal tear or episiotomy. The site where the placenta was attached inside your womb. Possibly a urinary catheter, or a bruise that's taking its time to fade.
Most of this heals without anything going wrong. But it's not always obvious where "healing looks a bit dramatic" ends and "this needs looking at" begins, especially when you're exhausted, and every ache feels like it could mean something.
Here's a clearer way to think about it.
The pattern that matters most
Some redness, tenderness, or swelling in the first few days after birth is genuinely normal, wherever the healing is happening. Tissue that's been cut, stretched, or stitched is meant to look a little inflamed while it repairs.
What matters is the direction things are moving. Healing tissue should be getting less red, less swollen, and less sore each day, not more. If a wound or area is becoming more red, more swollen, or more painful as the days go on, rather than settling, that's the pattern worth paying attention to.
Caesarean scar infection
Some tenderness and swelling along the wound in the first week is expected. What's different: redness spreading outward from the scar, the wound feeling hot to the touch, increasing pain rather than easing pain, or any discharge with an offensive smell. A wound that starts to gape open, or that was closing and then reopens, also needs review.
Perineal wound infection
If you had a tear or episiotomy, some soreness and swelling in the first couple of weeks is part of normal healing. It's worth checking if pain is increasing rather than gradually improving, if there's an unpleasant smell, or if the wound is separating rather than closing.
Discomfort can sometimes be aggravated by activities such as urinating and opening your bowels, wiping or wearing tight clothing. However, this should only be temporary and overall symptoms should gradually improve with time. Keeping the area clean by rinsing with warm water, gently patting it dry afterwards and wearing loose, breathable underwear can help keep you comfortable while the tissues continue to heal.
Urine infection (UTI)
A burning or stinging sensation when weeing, needing to go more often or urgently than usual, or urine that looks cloudy or smells strong can all point to a UTI. Fever, pain in your lower back or sides and nausea or vomiting alongside this is worth flagging sooner rather than later.
Endometritis (infection of the womb lining)
This can follow any birth, but is more common after a longer labour, an assisted delivery, or a caesarean. Signs include a fever, lower abdominal pain that isn't easing, and lochia (postnatal bleeding) that becomes heavier, smells offensive, or continues being bright red for longer than expected. Typically, lochia changes from bright red to pink or brownish within the first week postpartum.
Infected haematoma
A haematoma is a collection of blood under the skin, sometimes from birth or a wound. Most resolve on their own. An infected one tends to become increasingly painful, swollen, and warm to the touch, sometimes with visible redness spreading around it.
The consolidated infection red flag list
Across every wound site, the same handful of signs point the same direction:
Redness, swelling, or pain that's increasing, not settling
A fever
Discharge with an offensive smell
A wound that reopens, or won't close
If you notice any of these, it's worth getting checked promptly. This isn't about catastrophising every twinge, it's about knowing which patterns need a phone call. But if you're ever unsure, that uncertainty alone is reason enough to ask for a review.
Blood clots: the symptoms that need same-day attention
There's one set of symptoms after birth that sits in a different category entirely, and it's worth being direct about it: signs of a blood clot.
A blood clot, or venous thromboembolism (VTE), is a clot that forms inside a vein, most often in the leg. Pregnancy and birth naturally make your blood clot more easily, partly as the body's way of limiting blood loss. But that same protective mechanism means the risk of a clot forming somewhere it shouldn't is higher too. If a clot breaks loose and travels to the lungs, it becomes a pulmonary embolism, which is why chest symptoms are treated as a medical emergency.
The risk of a blood clot is highest in the first two weeks after birth, but it can persist for up to around 12 weeks. This isn't rare enough to ignore, and it's serious enough that it needs same-day medical attention, not a "wait and see".There are two types of symptoms that need urgent follow up.
Leg symptoms. Contact your GP or midwife urgently, the same day, if you notice any of:
Swelling in one leg that's noticeably more than the other
Pain, tenderness, or a hot feeling in one leg, particularly the calf
Redness running along one leg
Chest symptoms. If you notice any of the following, you need emergency care immediately, so call 999 or go to A&E:
Chest pain
Breathlessness, or breathing that suddenly feels harder than usual
Coughing up blood
One-sided leg pain and swelling after birth isn't something to sit on. Chest pain or breathlessness isn't something to monitor at home and see how it goes. Both need medical attention straight away.
You don't need to work this out alone
Trying to figure out, at 2am, whether what you're seeing is "normal enough" is an exhausting position to be in. You're allowed to ask, even if it turns out to be nothing. Early review is quick, straightforward, and often reassuring. And if it isn't nothing, catching it early makes treatment simpler too.
Trust the signs, not the guesswork. And reach out early.
Written by Hesta Health and validated by a registered postnatal GP.
Comments