Quick Answer
Newborns can become ill quickly, and signs of illness may sometimes be subtle. Parents should contact their baby’s healthcare provider whenever they are concerned, particularly if a newborn develops a fever, has difficulty breathing, feeds significantly less than usual, has fewer wet diapers, repeatedly vomits, becomes unusually difficult to wake, develops worsening jaundice, or simply seems noticeably different from their normal behavior. For babies 3 months or younger, a rectal temperature of 100.4°F (38°C) or higher requires prompt medical evaluation.
Key Takeaways
- Newborn illness can sometimes present differently from illness in older children.
- A temperature of 100.4°F (38°C) or higher in a baby 3 months or younger requires prompt medical attention.
- Difficulty breathing should never be ignored.
- Significant changes in feeding can be an important warning sign.
- Fewer wet diapers may indicate inadequate intake or dehydration.
- Increasing sleepiness or difficulty waking deserves medical attention.
- Jaundice should be monitored according to your healthcare provider's instructions.
- Repeated or forceful vomiting should be discussed with your pediatrician.
- Parents should pay attention to significant changes from their baby's usual behavior.
- When you're unsure whether something is concerning, calling your pediatrician is appropriate.
Introduction
One of the biggest adjustments to bringing home a newborn is realizing that you're now responsible for deciding whether something is normal.
Is that breathing sound okay?
Should the baby be sleeping this much?
Is that spit-up—or vomiting?
Are they eating enough?
Why haven't they had another wet diaper?
Is the baby warm because they're bundled up, or do they have a fever?
Newborns do many things that can look unusual to first-time parents.
They breathe irregularly.
They make strange noises.
They sneeze.
They hiccup.
They sleep a lot.
They may spit up.
Most of these behaviors are completely normal.
But newborns can also become sick quickly, which means parents should know which changes deserve a call to the pediatrician.
Fever in a Newborn
Fever is one of the clearest reasons to contact your baby's healthcare provider promptly.
According to the American Academy of Pediatrics, if your baby is 3 months or younger and has a rectal temperature of 100.4°F (38°C) or higher, you should contact your pediatrician immediately.
Young babies may require medical evaluation even if they otherwise appear well.
Do not give fever-reducing medication to a newborn unless specifically instructed to do so by your baby's healthcare provider.
If you're unsure how to accurately take your baby's temperature, ask your pediatrician to demonstrate the recommended method.
Source: American Academy of Pediatrics – Fever and Your Baby
Difficulty Breathing
Newborn breathing can look different from adult breathing.
Babies may occasionally breathe quickly, pause briefly, or make noises that surprise parents.
However, persistent breathing difficulty requires medical attention.
Watch for signs such as:
- Significant pulling in around or between the ribs.
- Persistent nostril flaring.
- Grunting with breathing.
- Difficulty feeding because of breathing.
- Persistent unusually rapid breathing.
- Blue, gray, or unusually pale coloring around the lips, face, or skin.
- Pauses in breathing that concern you.
Severe breathing difficulty or blue or gray coloring can be an emergency.
Call 911 or seek emergency medical assistance when your baby appears unable to breathe normally or has concerning changes in color.
Significant Changes in Feeding
Newborns eat frequently, but individual feeding patterns vary.
What matters is learning what is typical for your baby.
Contact your healthcare provider if your newborn:
- Suddenly refuses multiple feedings.
- Is repeatedly too sleepy to feed.
- Cannot stay awake long enough to eat.
- Consistently feeds significantly less than usual.
- Coughs or chokes repeatedly while feeding.
- Appears distressed during feeds.
- Has a sudden significant change in feeding behavior.
One unusual feeding isn't necessarily an emergency.
A meaningful change in your baby's normal pattern deserves more attention.
Fewer Wet Diapers
Wet diapers are one of the ways parents and healthcare providers assess whether a newborn is receiving adequate fluids.
The expected number changes during the first several days after birth and then generally increases.
Rather than relying on a universal number without considering your baby's age, ask your pediatrician what they expect for your individual newborn.
Contact your healthcare provider if you notice:
- Significantly fewer wet diapers than expected.
- A long period without urination.
- Very dark urine.
- Dry mouth.
- Poor feeding along with reduced urination.
- Unusual sleepiness accompanying fewer diapers.
These may indicate that your baby isn't taking in enough fluid or could be becoming dehydrated.
Jaundice
Jaundice causes yellowing of the skin and eyes and is common in newborns.
Many cases are mild and resolve with appropriate monitoring.
However, bilirubin levels can sometimes become too high.
Parents should follow their healthcare provider's recommendations for bilirubin testing and follow-up, particularly during the first days after hospital discharge.
Contact your baby's healthcare provider if:
- Yellow coloring appears to be increasing.
- Yellowing spreads farther down the body.
- Your baby is very sleepy or difficult to wake.
- Feeding becomes difficult.
- Your healthcare provider has instructed you to monitor specific symptoms.
The Centers for Disease Control and Prevention emphasizes that severe jaundice requires prompt attention because very high bilirubin levels can cause serious complications.
Source: Centers for Disease Control and Prevention – Jaundice and Kernicterus Information for Families
Spit-Up Versus Vomiting
Spitting up is extremely common during infancy.
Small amounts of milk may come back up during or after feeding, particularly when babies burp.
Vomiting is different.
Contact your pediatrician if your baby experiences:
- Repeated vomiting.
- Forceful or projectile vomiting.
- Green vomit.
- Blood in vomit.
- Vomiting accompanied by poor feeding.
- Vomiting accompanied by unusual sleepiness.
- Signs of dehydration.
Green vomit in a newborn can indicate a serious intestinal problem and requires urgent medical evaluation.
When in doubt, describe exactly what you saw rather than trying to determine the diagnosis yourself.
A Baby Who Is Difficult to Wake
Newborns sleep a lot.
But there's a difference between a sleepy newborn and a baby who is unusually difficult to arouse.
Pay attention if your baby:
- Doesn't wake enough to feed.
- Seems significantly less responsive than usual.
- Suddenly becomes unusually floppy.
- Doesn't respond normally to touch or stimulation.
- Has a dramatic change in alertness.
A significant change in responsiveness deserves prompt medical attention.
Crying That Seems Different
Babies cry.
Some babies cry a lot.
Crying alone doesn't necessarily mean something is medically wrong.
What may matter more is whether the crying is significantly different from your baby's usual behavior.
Contact your pediatrician if your baby has:
- An unusually weak cry.
- A very high-pitched or markedly different cry.
- Inconsolable crying accompanied by other symptoms.
- Crying that appears related to significant pain.
- A sudden dramatic change in behavior.
Parents become remarkably good at recognizing their baby's normal sounds.
If the cry sounds distinctly different to you, mention it.
Changes in Skin Color
Newborn skin can change color for many harmless reasons.
But certain changes require immediate attention.
Seek urgent medical care if your baby develops:
- Blue or gray lips or face.
- Persistent blue or gray skin.
- Significant unusual paleness accompanied by other concerning symptoms.
If your baby appears to be having difficulty breathing along with a concerning color change, call 911.
Umbilical Cord Concerns
Your baby's umbilical cord stump naturally dries and falls off during the early weeks.
A small amount of dried blood around the area may occur.
Contact your healthcare provider if you notice:
- Increasing redness spreading onto the surrounding skin.
- Swelling.
- Pus or significant drainage.
- Foul odor.
- Persistent bleeding.
- Fever.
- Baby appearing unwell.
Infection around the umbilical area can become serious in a newborn and should be evaluated promptly.
What About Newborn Rashes?
Newborn skin can do some surprising things.
Many babies develop harmless:
- Peeling.
- Milia.
- Baby acne.
- Temporary blotchiness.
- Common newborn rashes.
However, contact your pediatrician if a rash:
- Appears with fever.
- Blisters.
- Looks infected.
- Spreads rapidly.
- Appears purple or does not blanch when pressed.
- Is accompanied by significant changes in your baby's behavior.
When you're unsure, taking a clear photograph can sometimes help you describe what you're seeing when speaking with your healthcare provider.
Trust Changes, Not Internet Diagnoses
One of the challenges of parenting today is that every symptom can be searched instantly.
Unfortunately, searching:
"Why is my newborn breathing weird?"
at 2:00 a.m. can produce everything from completely normal newborn behavior to extremely rare medical conditions.
Online information can help parents learn.
It cannot examine your baby.
When you're genuinely concerned, contact the professional who can evaluate your individual newborn.
Your Instincts Matter
You may not have medical training.
But you spend more time observing your baby than almost anyone else.
You begin learning:
- Their normal cry.
- Their feeding pattern.
- Their usual alertness.
- Their skin color.
- Their breathing.
- Their diaper patterns.
- How easily they wake.
Sometimes parents can't identify exactly what is wrong.
They simply say:
"They're not acting like themselves."
That information matters.
You don't need to diagnose the problem before calling the pediatrician.
What Information Should You Have When You Call?
When contacting your baby's healthcare provider, it can help to have specific information available.
Be prepared to share:
- Your baby's age.
- Temperature and how it was taken.
- When the symptoms began.
- When your baby last ate.
- How much they ate when measurable.
- Recent wet and dirty diapers.
- Any vomiting.
- Changes in behavior.
- Breathing concerns.
- Medications or supplements.
- Anything else that seems different.
This is one reason simple newborn documentation can be useful during the early weeks.
Patterns are often easier to recognize when they're written down.
Common Misconceptions About Calling the Pediatrician
Myth: I'll Annoy the Pediatrician if I Call Too Often
Fact:
Pediatric practices expect questions from parents of newborns. If you're concerned, it is appropriate to call.
Myth: I Should Wait Until My Baby Looks Really Sick
Fact:
Newborn illness can sometimes progress quickly. Early changes in feeding, alertness, temperature, breathing, or diaper output can be important.
Myth: If My Baby Doesn't Have a Fever, They Aren't Sick
Fact:
Fever is important, but newborn illness can present with other symptoms as well.
Myth: I Need to Know What's Wrong Before Calling
Fact:
You don't need a diagnosis. Your job is to describe what you're seeing. Your healthcare provider's job is to determine what it may mean.
Know Your Pediatrician's After-Hours Plan
Don't wait for the first middle-of-the-night concern to figure this out.
Before bringing your baby home, know:
- Your pediatrician's regular phone number.
- Their after-hours number or procedure.
- Which urgent care facilities evaluate newborns.
- Which hospital your pediatrician recommends for emergencies.
- When they want you to call 911 rather than the office.
Save this information in both parents' phones.
When you're frightened or exhausted, you don't want to be searching for it.
The Bigger Picture
Bringing home a newborn comes with a strange combination of wonder and uncertainty.
You will probably spend time staring at your baby wondering:
"Is that normal?"
Most of the time, it will be.
Newborns sneeze.
They hiccup.
They grunt.
They make strange faces.
They breathe differently than adults.
They spit up.
They sleep in unpredictable patterns.
And gradually, you learn your baby.
That familiarity becomes one of your most valuable parenting tools.
You don't need to become your baby's pediatrician.
You simply need to notice meaningful changes, know the important warning signs, and feel comfortable asking for help when something doesn't seem right.
When you're uncertain, make the call.
That's exactly what your baby's healthcare team is there for.
Sources
- American Academy of Pediatrics. Fever and Your Baby. HealthyChildren.org fever guidance
- Centers for Disease Control and Prevention. Jaundice and Kernicterus Information for Families. CDC newborn jaundice information
- American Academy of Pediatrics. Newborn and Infant Health Resources. HealthyChildren.org
About The Newborn Care Solutions Agency
The Newborn Care Solutions Agency is the only newborn care placement agency founded by an internationally accredited training provider. Based in Scottsdale, Arizona, we serve families nationwide by connecting them with rigorously vetted, professionally trained Newborn Care Specialists and Postpartum Doulas.
One of the benefits of having an experienced newborn professional in your home is having another knowledgeable set of eyes observing your baby's everyday patterns. Newborn Care Specialists do not diagnose medical conditions or replace your pediatrician, but they can help parents recognize changes, maintain accurate feeding and diaper logs, understand normal newborn behavior, and identify when something should be brought to the attention of the baby's healthcare provider.
That combination of professional newborn support and appropriate pediatric care can help parents move through the early weeks with greater confidence while keeping medical decisions exactly where they belong—with your baby's healthcare team.
For more information, visit The Newborn Care Solutions Agency at thencsa.com or call (602) 695-6775.
