Newborn Warning Signs: 10 Symptoms Parents Should Never Ignore

The first weeks with a new baby bring a steep learning curve. Newborns sneeze, hiccup, grunt, startle and breathe irregularly. Nearly all of this is normal, and most babies stay well through the newborn period.

Newborns do have less reserve than older children, though. Infections and other problems can progress quickly, and early signs may be subtle — a baby who "just isn't feeding well" or seems unusually sleepy. Knowing which symptoms need prompt attention lets you act quickly when it matters and worry less about the rest.

This guide is not a diagnostic tool. If you are ever unsure whether your baby is unwell, have them checked. When a newborn is involved, it is always better to be seen and reassured than to wait.

10 Newborn Warning Signs

1. Difficulty Breathing

Watch for breathing that is consistently fast (more than about 60 breaths a minute when your baby is calm), grunting with each breath, flaring nostrils, the skin between or below the ribs sucking in, or pauses in breathing that last longer than about 15–20 seconds. Any of these needs emergency care.

2. Blue, Grey or Unusually Pale Appearance

Bluish hands and feet can be normal in the first day or two, especially when a baby is cold. But blue or grey lips, tongue or face, or skin that looks very pale or blotchy, can mean your baby isn't getting enough oxygen or is seriously unwell. Seek emergency care immediately.

3. Poor Feeding

Most newborns feed 8–12 times in 24 hours. A baby who repeatedly refuses feeds, is too sleepy to feed, tires quickly, or takes much less than usual needs to be checked the same day. Poor feeding is one of the most common early signs of illness in newborns.

4. Excessive Sleepiness or Difficulty Waking

Newborns sleep a lot, but they should wake for feeds and respond when handled. A baby who is floppy, very hard to wake, doesn't stay awake to feed, or only moves when stimulated needs urgent assessment.

5. Fever or Abnormal Temperature

A temperature of 38°C (100.4°F) or higher in a baby under 3 months needs urgent medical assessment, even if your baby otherwise seems well. A low temperature (below about 36°C when measured under the arm), or a baby who feels cold despite being dressed appropriately, can also be a sign of infection. Do not give fever medicine to a newborn without medical advice. Our guide to fever in children explains how to measure temperature accurately.

6. Repeated Vomiting

Small spit-ups (possets) after feeds are very common. Seek prompt advice if vomiting is forceful or projectile after most feeds, or if your baby can't keep feeds down. Green or yellow-green vomit is different: it can signal a blockage in the bowel and needs emergency care.

7. Fewer Wet Diapers or Signs of Dehydration

Fewer wet diapers than expected, dark yellow urine, a dry mouth, or a sunken soft spot (fontanelle) on the head can mean your baby isn't getting enough milk. See the section on feeding and wet diapers below for what to expect.

8. Seizure-Like Activity

Seizures in newborns can be subtle: rhythmic jerking of an arm or leg, stiffening, repeated lip-smacking or chewing movements, staring, or pauses in breathing. Newborns can also be "jittery", which usually stops when you gently hold the limb. If you see movements that don't stop when held, or you're unsure, seek emergency care. If it's safe to do so, a short video on your phone can help the doctor.

9. Jaundice That Is Worsening or Concerning

Yellowing of the skin and eyes is common in newborns, but some jaundice needs urgent treatment. See the section on newborn jaundice below.

10. Significant Change in Behaviour or Responsiveness

You will quickly learn what's normal for your baby. A weak, high-pitched or unusual cry, constant irritability that can't be settled, or a baby who seems less alert or less interested in you than usual are all reasons to have them checked promptly.

When Is Newborn Jaundice Normal and When Is It Concerning?

Many healthy newborns develop mild jaundice. It usually appears on day 2 or 3, peaks around days 3–5, and fades within about two weeks. It happens because a newborn's liver is still maturing and clears bilirubin (a yellow pigment) slowly.

Jaundice needs prompt medical assessment if:

• It appears in the first 24 hours after birth
• It is spreading to the tummy, arms, legs, palms or soles, or looks deeper yellow
• Your baby is very sleepy, feeding poorly or floppy
• It lasts longer than 2 weeks in a baby born at term, or 3 weeks in a premature baby
• Your baby passes pale, chalky or white stools, or dark urine that stains the diaper

Jaundice can be harder to see on darker skin. Check the whites of the eyes, the gums, and the palms and soles. Don't rely on placing your baby in sunlight to treat jaundice; this is not a safe or reliable treatment. Pale stools and prolonged jaundice can occasionally point to a liver problem. Our article on liver problems in children explains why early checks matter.

Feeding and Wet Diapers

Counting wet and dirty diapers is one of the simplest ways to tell whether your baby is getting enough milk:

• In the first few days, the number of wet diapers usually increases day by day
• From around day 5 onwards, expect at least 6 heavy, wet diapers in 24 hours, with pale urine
• Stools change from dark, sticky meconium to yellow stools by around day 4–5, particularly in breastfed babies
• Losing some weight in the first few days is normal. Most babies regain their birth weight by around 2 weeks

If your baby is producing fewer wet diapers than this, still has dark stools after day 5, or you're concerned about feeding, contact your pediatrician the same day. Babies who were born early or small may need closer feeding support. See our guide to caring for a low birth weight newborn.

Breathing in Newborns

Newborn breathing can look alarming even when it's normal. Babies breathe faster than adults, usually around 30–60 breaths a minute, and often breathe irregularly during sleep: a few quick breaths, then a short pause of a few seconds, then normal breathing again. Snuffly, noisy breathing from a blocked nose is also common.

What is not normal: breathing that stays fast when your baby is calm, grunting, nostrils flaring, the chest or skin between the ribs pulling in, pauses of 15–20 seconds or longer, or any colour change around the lips. These need emergency assessment.

When to Seek Emergency Care

Go to your nearest emergency department immediately if your newborn:

• Is struggling to breathe, grunting, or has pauses in breathing
• Has blue, grey or very pale lips, tongue or skin
• Is floppy, very hard to wake, or unresponsive
• Has a temperature of 38°C or higher, or an abnormally low temperature
• Has a seizure or seizure-like movements
• Vomits green or yellow-green fluid, or has a swollen, tense tummy
• Has jaundice in the first 24 hours, or jaundice with poor feeding and unusual sleepiness
• Has a rash that doesn't fade when pressed

Do not wait for a clinic appointment for any of these symptoms, and do not wait to see if they improve.

When to Contact a Pediatrician

Some concerns aren't emergencies but should still be checked the same day or soon after:

• Feeding is becoming harder, or you're unsure whether your baby is getting enough
• Mild jaundice that isn't fading after about 2 weeks
• Redness, swelling, pus or a bad smell around the umbilical cord stump
• Sticky or red eyes
• A rash, or white patches in the mouth that don't wipe off
• Spitting up that seems to be increasing, or poor weight gain

Routine newborn checks and the first vaccinations are also a good time to raise questions. See our childhood vaccination schedule and our guide on when to see a pediatrician. If your baby needed special care after birth, our article on NICU and newborn nursery care explains what to expect.

Final Thoughts

You know your baby better than anyone. Most newborn worries turn out to be normal newborn behaviour, but the signs above are the ones that shouldn't wait. If something doesn't feel right, trust that instinct and get your baby checked.

This article is for general educational purposes and does not replace personalised medical advice. Please consult Dr. Yasser Masood or your child's pediatrician for guidance specific to your child. In an emergency, contact your nearest emergency department immediately.