The umbilical cord stump typically falls off about 5 to 10 days after birth, with an average around 7 days. Half of all newborns lose the stump between 5 and 8 days. The fastest recorded separations happen around 2 days, while some healthy babies take up to 2 weeks. Anything beyond 3 weeks is considered delayed and affects up to 10% of newborns.
What Happens as the Stump Dries
After the cord is clamped and cut at birth, the small remaining stump has no blood supply. It begins to dry out, shrink, and change color over the coming days. You’ll notice it shift from yellowish-green to brown and eventually to a dark, almost black color. This looks alarming but is completely normal. The stump is essentially dead tissue going through a natural drying process, similar to how a scab forms and hardens.
White blood cells gradually break down the connection between the dried stump and the living skin beneath it. As this happens, you may see small amounts of clear or blood-tinged fluid seeping around the base. The stump can also bleed slightly when it finally detaches, especially if it catches on a diaper or clothing. A few drops of blood at separation is nothing to worry about.
How to Care for the Stump
The current standard is dry care: leave the stump alone and let air do the work. Older advice recommended cleaning the base with rubbing alcohol, but that actually slows separation. Keeping the area clean and dry is all that’s needed.
Fold the front of your baby’s diaper down below the stump so it doesn’t trap moisture, urine, or stool against the skin. Some newborn diapers come with a cutout for this purpose. If poop or pee does get on the stump, wipe it gently with a damp cloth and let it air dry. Dress your baby in loose clothing that doesn’t press against the area, and skip full tub baths until after the stump falls off. Sponge baths work well in the meantime, though research has found that tub baths don’t actually interfere with cord healing if you pat the area dry afterward.
Resist the urge to pull or twist the stump, even if it looks like it’s hanging by a thread. Let it separate on its own.
Normal vs. Concerning Signs
Color changes, a small amount of dried blood, and a bit of clear oozing are all part of the normal process. The skin around the base may look slightly pink as it heals.
The signs that need medical attention are distinct. Redness spreading outward from the base onto the surrounding belly skin, swelling or puffiness around the navel, and pus (thick yellow or green discharge) all point to a possible infection called omphalitis. A foul smell is another red flag, particularly for bacterial infections. If your baby also develops a fever, seems unusually sleepy, or is feeding poorly alongside any of these local signs, that combination warrants prompt evaluation. Cord infections are uncommon with proper dry care, but they can escalate quickly in newborns.
When Separation Takes Longer Than Expected
If the stump hasn’t fallen off by 3 weeks, your pediatrician will likely want to take a closer look. In most cases, there’s no serious underlying problem. But delayed separation can occasionally signal an immune system condition called leukocyte adhesion deficiency, where certain white blood cells can’t reach tissues properly to break down the cord. It can also be linked to a deficiency in a clotting protein called factor XIII. Both conditions are rare, but they’re the reason doctors pay attention to stumps that linger well past the typical window. A simple blood test can check for these.
What to Expect After It Falls Off
Once the stump detaches, you’ll see a small raw-looking area where your baby’s belly button is forming. It may be slightly moist or pink for a few days. This is normal healing. Keep the area clean and dry, and it should close up within a week or so.
Occasionally, a small soft pink or red lump forms at the belly button after the stump separates. This is called an umbilical granuloma, an overgrowth of tissue during the healing process. It often oozes small amounts of clear or yellowish fluid and doesn’t cause your baby pain. Many granulomas resolve on their own, but if one persists beyond about 5 days, your doctor can treat it with a quick application of silver nitrate or, rarely, a minor procedure. It’s a common and easily managed issue.