The cord stump dries up and drops off somewhere between days 5 and 21, and most babies are left with a clean little belly button. A few are left with a soft pink lump that won't quite heal — moist, slightly weeping, looking like a tiny strawberry. That's almost always a granuloma: harmless, painless, and easy to treat.
The reason this article exists is the one thing it isn't: infection. Omphalitis in a newborn is rare in the UK now, but when it happens it can move fast, and parents need to know how to tell the two pictures apart.
Healthbooq (healthbooq.com) covers the early weeks at home with a newborn, including what to look at and what to leave alone.
Why a Granuloma Forms
When the cord stump separates, the small wound underneath heals like any other — a thin layer of skin grows in from the edges and seals the navel. In some babies, the healing tissue overshoots: instead of stopping when it meets, it keeps building up, producing a small mound of moist red-pink granulation tissue at the base of the belly button. That overshoot is the granuloma.
It's not an infection, not a cause of pain, and not a sign that anything is wrong with your baby's healing or immunity. It's just the body doing the right thing for slightly too long.
What It Looks Like
A typical granuloma is:
- A pink to dull red lump, often the size of a pea or smaller, occasionally larger.
- Moist and glistening, sometimes with a small clear or slightly milky discharge.
- Soft, sometimes on a small stalk.
- Painless — your baby doesn't react when you touch it.
- Surrounded by normal skin — no redness creeping out into the belly.
- The baby herself is entirely well.
If that's the picture, you can book a routine GP appointment. There's no rush.
What Looks Different — and Means Hurry
Omphalitis is umbilical infection. The picture is unmistakable when you've seen it once:
- Redness spreading from the navel into the surrounding skin — the key feature.
- The skin around the navel feels warm and looks swollen or shiny.
- Foul-smelling discharge — often yellow-green or with pus.
- The baby is off feeds, lethargic, irritable, or has a fever.
Newborn immune systems are still naive, and an infection at the umbilicus has direct routes into the abdomen and bloodstream. Any baby under 28 days with these features needs same-day medical assessment — A&E or 111 routed urgently, not "let's see how it is tomorrow." Most are treated with IV antibiotics in hospital.
If you're not sure whether it's a granuloma or early omphalitis, treat the uncertainty as a reason to be seen sooner rather than later.
Two Other Things It Could Be
Persistent discharge from the navel that doesn't fit a granuloma might be:
- Patent urachus — the channel that ran from the bladder to the umbilical cord in fetal life hasn't closed. The clue is clear, watery discharge (it's urine), often after the nappy is taken off, sometimes increasing when the baby cries.
- Patent omphalomesenteric duct — a remnant connection from the gut. Persistent discharge that doesn't respond to standard granuloma treatment.
Both are uncommon and need a paediatric surgical referral, but a GP will pick them up if a presumed granuloma keeps coming back after treatment.
Treatment Options
Silver nitrate cauterisation is the standard NHS treatment. The GP or practice nurse rolls petroleum jelly around the navel to protect the normal skin, then touches a silver nitrate stick onto the granuloma for a few seconds. The tissue turns black, dries up, and separates over the next week. Most granulomas resolve in 1–3 sessions, a week apart. It doesn't hurt the baby — granulation tissue has no nerve endings — though the chemical can irritate the surrounding skin if the protection isn't carefully placed.
String ligation is the option for granulomas on a clear stalk. A fine suture or umbilical thread is tied tightly around the base, the blood supply is cut off, and the lump withers and falls off within 1–2 weeks. Useful when silver nitrate hasn't worked or isn't available.
Salt treatment is the home remedy that's gained traction: a small pinch of fine table salt applied to the granuloma, covered with gauze for around 30 minutes, and gently wiped off, repeated daily for a few days. There are case series suggesting it works (notably an Egyptian study and a Turkish series by Unal and colleagues in 2018), but the evidence base is thinner than for silver nitrate. If you want to try it, see your GP first to confirm the diagnosis, because using salt on early omphalitis or a patent urachus would be a mistake.
What to skip: nothing useful comes from rubbing alcohol, antibiotic creams, or hydrogen peroxide on a granuloma. Most don't help and some delay healing.
Cord Care Through the First Weeks
Current UK guidance is the simplest version: keep the cord stump clean and dry, fold the nappy below it so urine doesn't soak it, let air get to it. Don't use alcohol wipes routinely — they don't speed separation and may delay it. Top-and-tail washing is fine; full immersion baths can wait until the stump has fallen off and the navel is dry.
If a small amount of dark old-blood-coloured discharge appears at separation, that's normal. If you're seeing fresh red bleeding, an obviously soaked nappy with reddened blood, or any of the omphalitis features above, that's a same-day call.
When to Get Seen
- Routine GP appointment — moist pink lump in the navel, baby well, no surrounding redness.
- Same-day GP / 111 — discharge that's smelly, yellow, or green; surrounding skin redness; baby less than 28 days old with anything umbilical that doesn't look right.
- A&E — spreading redness, swelling, fever, or an unwell-looking newborn.
Key Takeaways
After the cord stump falls off, some babies are left with a small, pink, moist lump where the navel is healing — that's a granuloma. It's overgrown healing tissue, not infection, the baby feels nothing, and a brief silver nitrate treatment at the GP usually clears it in one or two visits. The thing to keep separate in your head is omphalitis: redness spreading into the skin around the belly button, a smelly discharge, an unwell baby. That picture is urgent in a newborn — same day, not next week.
