When it happens · 3 min read
The cord stump: what it needs, and the one infection to know about
It's one of the first things you're left alone with: a drying stump of cord on a brand-new person, and a vague instruction to keep it clean. Here's the whole job, and the one complication actually worth knowing by name.
Last updated August 9, 2026
The whole job
Keep it clean and dry, and let it be. Fold the top of the diaper down below the stump so it isn't sitting in urine, give sponge baths rather than tub baths until it falls off, and skip the old advice about alcohol swabs — current guidance is dry care, since routine alcohol can actually delay separation. Air helps; fiddling doesn't.
The stump typically darkens, shrivels, and falls off on its own within one to three weeks. Never pull it, even when it's hanging by a thread — it detaches when it's ready. A few drops of blood at separation, like a scab lifting, is normal, as is a slightly moist or crusty look in the final days.
Omphalitis: the one to know
Infection of the cord area is uncommon, but in a newborn it can spread quickly, which is why it gets a same-day response rather than a wait. The signs: redness spreading on the skin around the base (not just the stump itself looking dark — that's drying), swelling, a genuinely foul smell, pus, ongoing bleeding beyond a few drops, or a baby who cries when the area is touched or who has a fever. Any of those, call your pediatrician the same day.
After it falls off
The new belly button may look raw for a few days — fine. If a small pink lump of moist tissue persists and oozes, that may be an umbilical granuloma, which is harmless and easily treated at the office. And if the area bulges outward when your baby cries, that's likely an umbilical hernia — common, usually painless, and most close on their own; mention it at the next checkup rather than treating it as urgent.
Common questions
- The stump smells a little. Is that infection?
- A mild odor as it dries can be normal. A foul smell — the kind that makes you recoil — especially with redness or discharge, is the version worth a same-day call.
- It's been more than three weeks and it hasn't fallen off. Problem?
- Usually not, but mention it to your pediatrician — occasionally a slow-to-separate cord is worth a look, and they may also check for a granuloma once it does come off.
- Can I do tub baths once it's off?
- Yes — once the stump is off and the site looks healed (typically a few days later), regular baths are fine.
If it's this, not that
Still not sure
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