A fussy newborn is almost never a sign that something is seriously wrong. But in the first weeks of life, the reasons babies cry — and the responses that actually work — are specific. This guide covers the 10 most common causes and what to do about each one.
1. Hunger
Hunger is the most common reason a newborn cries. Newborns have stomachs the size of a marble at birth and need to feed every 2–3 hours around the clock. Watch for hunger cues before the crying starts: rooting (turning the head side to side), sucking on hands, or smacking lips. A crying baby is a late hunger cue — a harder feed to start.
2. Needing to Be Held
Newborns spent nine months in a tight, warm, constantly-moving environment. Being put down in an open flat space is jarring. Skin-to-skin contact, swaddling snugly, and carrying in a front carrier all reduce fussiness — particularly in the late afternoon and evening hours (the classic “witching hour” between 5–8 PM).
3. Gas and Digestive Discomfort
Newborn digestive systems are immature. Gas bubbles get trapped, cause discomfort, and trigger crying. After each feed, hold your baby upright and burp for 5–10 minutes. Bicycle leg movements and gentle clockwise belly massages can help move gas. If your baby is formula-fed and consistently gassy, ask your pediatrician about switching formulas.
4. Colic
Colic is defined as crying for more than 3 hours per day, more than 3 days per week, for more than 3 weeks in an otherwise healthy infant. It typically starts around 2–3 weeks, peaks at 6 weeks, and resolves by 3–4 months. The cause is not fully understood. It is not your fault. The 5 S’s — swaddle, side/stomach position while held, shush, swing, suck — help most babies during colic episodes.
5. Overstimulation
After a busy day of feeds, diaper changes, visitors, and stimulation, some newborns simply reach their limit. Signs of overstimulation include turning the head away, arching the back, or crying that worsens when you try to engage or play. The fix: dim the lights, reduce noise, swaddle, and give your baby a quiet, calm environment for 20–30 minutes.
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6. Tiredness
Overtired newborns often cry more, not less. Many parents expect a tired baby to fall asleep easily, but newborns who miss their sleep window become harder to settle. Watch for sleepy cues (yawning, glazed eyes, losing interest in surroundings) and start the wind-down routine before full meltdown.
7. Discomfort or Pain
Check the basics: a hair wrapped around a toe or finger (hair tourniquet syndrome), clothing that is too tight or has a tag rubbing, a diaper that is on crooked, or a scratch from a tiny fingernail. These are quick fixes that end the crying immediately when found.
8. Illness
A sick newborn usually has a different cry — higher-pitched, more urgent, and harder to console than a hunger or gas cry. Other signals: fever (rectal temp 100.4°F or higher in a baby under 3 months = ER), refusal to feed, unusual limpness, or difficulty waking. Trust your instinct. If something feels different, call.
9. Needing a Diaper Change
Some babies are bothered by a wet or dirty diaper; others are not. But it is always worth checking before moving to more complex soothing. A simple diaper change stops the crying surprisingly often.
10. Wanting Non-Nutritive Sucking
Sucking is deeply calming for newborns independent of feeding. A pacifier, a clean finger, or even letting your baby suck at an empty breast can stop fussing quickly. The American Academy of Pediatrics endorses pacifier use once breastfeeding is established (typically 3–4 weeks).
When to Call Your Pediatrician
- Your baby has a fever (100.4°F rectally) — especially under 3 months
- Crying is high-pitched, weak, or unlike their normal cry
- Your baby is difficult to console for more than 2 hours straight
- They are refusing to eat or seem too tired to feed
- You notice any physical change: rash, swelling, unusual skin color
Fussiness in the first weeks is exhausting and disorienting. But the vast majority of the time, it is a communication — not a crisis. Work through the list above systematically, and call your pediatrician whenever you’re unsure.
