Umbilical cord stump infection signs include changes in the skin around the stump and unusual discharge. Red or discolored skin, especially if it is spreading, and skin that is swollen, warm, or tender are signs to take seriously. [1][2] For more detail, see When Does the Umbilical Cord Stump Fall Off?
Yellowish discharge with a foul smell or yellow-green pus can also point to infection. [2][3]
It can be hard to judge a small change when you are caring for a newborn, so trust what you notice and ask for guidance. For example, if the skin looks redder than it did earlier or you see pus-like drainage, call rather than waiting to see whether another symptom develops. While you arrange care, focus on sharing what you observed and following the clinician’s advice. Keep the concern simple and specific: describe the change you see, without needing to decide on your own whether it is an infection.
How can you tell if redness or swelling is concerning?
Check the skin around the stump for changes in color, swelling, warmth, or tenderness; these details can help you describe what you’re seeing to your baby’s clinician. Redness or discoloration around the base, especially when it appears to spread, is a sign to take seriously. [1] [2] [3]
Look in good light and compare the skin at the base with nearby skin. For example, note whether a small patch of redness stays in one spot or seems to extend farther onto the belly. You don’t need to decide what is causing the change; simply describe where it is and whether it looks different over time.
Also notice whether the skin looks puffy, feels warmer than nearby skin, or seems thick or hard around the stump. These changes can occur alongside redness, but you can report them even if you do not see every sign at once. [1] [2]
If you touch the area during routine care, notice whether your baby reacts as if it hurts. Crying when the skin around the cord is touched can be a sign of tenderness to report. [3] Keep your description simple: for instance, say that the skin feels warmer than the surrounding belly, or that your baby cries when you gently touch near the base.
Try not to judge the area from one glance if the color or texture is hard to make out. Look in steady light, and focus on what you can observe: where the redness is, whether it seems to be spreading, and whether the skin feels swollen, warm, thick, hard, or tender. If you’re unsure how to describe a change, use plain words and explain what you noticed to the clinician.
What should discharge or odor look like?
Pay attention to the discharge’s color and odor, and contact your baby’s clinician about foul-smelling yellowish drainage, visible pus, or continued bleeding. [3][4] A small amount of moisture by itself can be harder to interpret, so look at what the fluid is like and whether it changes over time.
Notice what the fluid looks and smells like
Normal secretions can come from the belly button for several days. [5] That means seeing some moisture does not, by itself, tell you whether there is an infection; the details matter.
For example, note whether the fluid is clear or colored, whether it has a strong unpleasant smell, and whether it looks like pus. Foul-smelling yellowish discharge is a warning sign, and pus may look yellow-green. [2][3] Describe those details when you speak with the clinician rather than relying on the amount of fluid alone.
Don’t overlook bleeding
Continued bleeding from the stump is also a reason to contact your baby’s clinician. [4] If you notice blood as well as drainage, mention both, along with whether the bleeding is ongoing.
A brief note can help you give a clear description: “There’s yellowish fluid with an unpleasant smell,” or “It keeps bleeding.” If the appearance is difficult to judge, describe what you see in plain terms and ask the clinician what to do next.
When should you call your baby’s clinician?
Call your baby’s clinician promptly if you notice concerning changes around the stump, and tell them when those changes began and how they have changed. Redness around the base, swelling, warmth, tenderness, foul-smelling discharge, or pus are reasons to call. [2][3]
What to tell the clinician
Keep your description specific: say when you first noticed the change, where it is, and whether it seems to be spreading or getting worse. For example, you might explain that the area looked different after a diaper change and has looked more pronounced since, or that you noticed drainage at the same time. These details help the clinician understand what you are seeing. [2]
Mention whether there is drainage and describe what you observe, such as its color or smell. If you are calling about more than one change, name each one rather than saying only that the stump looks unusual. [1][2][3]
If you are unsure
You do not have to decide on your own whether a change is normal. If you are unsure, contact your baby’s clinician and describe what you noticed; they can guide you on what to do next. [3]
It can help to have a clear view of the area before you call, but you do not need a perfect description to ask for help. If the change is hard to explain, use simple observations such as when it started, whether it has changed, and whether you see any drainage. [1]
A brief, clear call is a reasonable next step when something about the stump concerns you. Share what you have observed, answer the clinician’s questions, and follow their guidance. [3]
What should you do while you arrange care?
Check the area in good light. Gently look at the skin and stump without pulling or pressing on it. Note what you see and feel, including redness, swelling, tenderness, the color of any discharge, any odor, and whether there is bleeding. A quick written note can help you give a clear description when you call.
Call your baby’s clinician and describe the changes. Share when you first noticed them and what has changed since then. For example, you might say, “I noticed redness this morning, and there is now some discharge,” or explain that you see bleeding or notice an odor. Give the clinician the details you observed, then follow their instructions about what to do next.
Avoid trying to treat a suspected infection on your own. Don’t put products on the area or try a home remedy unless the clinician directs you to. Keep your focus on getting professional guidance rather than deciding on a treatment yourself. If you cannot reach the clinician, use the care team’s usual instructions for after-hours calls.
Can a little moisture be part of normal healing?
A little moisture can be part of normal healing: the belly button may ooze secretions for several days. [5] Moisture alone does not tell you whether there is a problem, so look at the discharge and the skin around the stump together.
Look at more than the moisture
Notice whether the discharge is clear or cloudy, and whether it has an unusual odor. Foul-smelling or pus-like discharge is more concerning than moisture by itself. [3][5] For example, a small amount of fluid without an unpleasant smell is different from drainage that smells bad or looks like pus.
Also check the surrounding skin and how your baby responds when the area is handled. Redness, swelling, and tenderness add context to what you see; don’t judge the situation by the presence of moisture alone. [3] A damp stump with skin that looks unchanged and no tenderness is a different picture from moisture alongside a change in the surrounding skin.
When you are unsure
If you cannot tell whether the discharge or the surrounding skin looks concerning, ask your baby’s clinician for guidance rather than relying on appearance alone. [5] You can describe what you noticed, such as whether the moisture seemed clear or pus-like and whether there was an odor or a change in the skin. That gives the clinician a clearer picture to advise you.
You do not need to decide on your own whether a little moisture is normal. Pay attention to the whole picture, and reach out when it is unclear.
Trust your concern and ask for guidance
The key takeaway is simple: if the skin around your baby’s stump looks red, swollen, or warm, feels tender, or you notice foul-smelling pus, call your baby’s clinician for guidance. [2] [3] You do not need to decide on your own whether the change is an infection; explaining what you see is a useful first step.
A few days of secretions by themselves do not tell you whether an infection is present. [5] Pay attention to the surrounding skin and any concerning odor or changes, and mention them when you call. [2] [3] For example, if you see drainage but are unsure whether its smell or the skin around the stump seems unusual, describe that uncertainty rather than trying to diagnose it yourself.
If you are uncertain, calling the clinician is a practical next step. Tell them what you noticed and ask what they recommend; you can make that call even when you are not sure the change is serious. A clear description of your concern helps you get guidance without having to wait until you feel certain.