Irritability in newborns

Irritability in newborns: When crying is more than just crying

All newborns cry—it’s their primary way of communicating. However, sometimes parents encounter a situation where the baby seems constantly dissatisfied, fussy, hard to soothe, and sleeps poorly. This heightened irritability can be a temperament trait or a signal of discomfort or a medical issue.

Possible causes of irritability

If the baby is constantly fussy, first of all, common causes of discomfort should be ruled out:

• Hunger or thirst.
• Pain: Most often it’s abdominal pain due to colic or gas. It can also be pain from diaper dermatitis or uncomfortable clothing.
• Overtiredness or overstimulation. A newborn’s nervous system is easily overloaded. Too many guests, noise, or light can lead to a hissy fit.
• Gastroesophageal reflux. The return of acidic stomach contents into the esophagus causes heartburn and pain.
• Food sensitivity. Sometimes irritability can be a reaction to proteins (e.g., cow’s milk) in the nursing mother’s diet.

Temperament and the “fourth trimester”

Some children are more sensitive and demanding from birth. They need more contact, being held, and soothing. This is not “spoiling,” but an innate need. The concept of “the fourth trimester” helps understand that the baby is still adapting to life outside the womb and seeks to recreate familiar conditions—warmth, closeness, and constant contact.

If irritability is excessive, accompanied by fever, refusal to eat, or other concerning symptoms, it warrants a pediatric consultation. Read about infant temperament in our blog.