Irritability and Behavior Changes in Children

Common Causes in Children

Most of the time, irritability has a simple cause that can be addressed. Consider if any of these factors are at play:

Lack of sleep
Hunger
Frustration
Teething
Feeling too hot or cold
Constipation
Common illnesses like colds, stomach bugs, or ear infections
Changes in routines, school, or family life

When Irritability May Signal Something More Serious

Less commonly, persistent irritability or significant behavior changes can be a sign of a more serious issue. These might include:

Undiagnosed health conditions (e.g., diabetes, asthma, anemia)
Serious infection
Head injury (which may not have been witnessed)
Hearing or speech problems
Autism or developmental concerns
Depression or mental health conditions
Bullying or assault

How To Tell The Difference

It can be tough to know if there’s something serious going on. Your pediatric clinician can evaluate for underlying physical and mental health causes, then create a treatment plan.

Understanding When Your Child Needs Care

Irritability and behavior changes can range from normal developmental phases to signs that need prompt attention. If you are concerned or unsure, reach out to your Zarminali clinician.

Contact the Clinic

We want to see your child if:

Irritability or behavior changes have lasted more than 2 weeks without an obvious cause.
Your child has lost interest in activities they previously enjoyed.
Your child is avoiding or withdrawing from friends or family.
Sleep or eating patterns have gotten worse.
School performance has declined.
Your child is avoiding school.
Frequent headaches or stomachaches accompany the changes.
Difficulty concentrating or focusing is new or worsening.
Persistent defiant, disobedient, or out-of-control behavior is worsening.
Behavior changes follow a head injury, recent illness, or new medication.
Toddler tantrums are lasting a long time.
Your child causes self-harm or self-injury.
You have heard your child say anything (even once or casually) about not wanting to be alive, not mattering, or wishing they weren’t here.
Your child is hearing voices, seeing things that aren’t there, or expressing beliefs that are disconnected from reality.
You feel like something is wrong, even if you’re not sure what it is.

Seek Emergency Care
Call 911 or seek emergency care if:

Your child is expressing intent to harm themselves or others.
You believe your child is experiencing a life-threatening emergency.

If your child is in crisis, you can also call or text the Suicide and Crisis Lifeline at 988. These situations can feel scary, but know you’re not alone, and you can get your child the help they need.

Age and Developmental Stage

Infants cry for many reasons, and it’s part of their normal development. If your baby is crying, try soothing by offering a feed, a clean diaper, and the 5 S soothing strategies (see at-home care below). Contact us if your baby cries for more than three hours, cannot be consoled, has a fever of 100.4 or higher, or is showing signs of being in pain.
Toddlers and preschoolers often become frustrated and throw tantrums as they learn to express themselves. When your child is having a tantrum, stay calm, name feelings, and redirect if possible, or put them in a safe place and tell them they can return when they are calm (time out). Consider whether tiredness, hunger, or disruption in routine may be contributing. Lack of a dependable routine or sudden changes can make it harder for toddlers to cope. If irritability persists for days without a clear cause or escalates to physical aggression, please reach out.
Kids in elementary school can have hard days and bad moods just like everyone else. Consider sleep, hunger, discomfort, and routine changes. Encourage them to talk about what’s bothering them and brainstorm solutions together.
Teens and pre-teens are dealing with puberty, defining their identities, and seeking independence from parents. But they still rely on you to enforce expectations, support their emotional ups and downs, and guide them through life’s challenges. Contact your clinicians if mood swings are constant rather than intermittent, if they are avoiding social situations, struggling in school, committing or talking about self-harm or harm to others, or frequently picking fights (verbal or physical).

Duration

How long has this been going on? Behavior changes tied to a specific event—changing schools, a divorce, a loss—are to be expected. But if they don’t improve a few weeks after that event passes, give us a call.

Context and Consistency

A couple of tough days could be normal. What matters is pattern and consistency. Take note if behavior changes show up across settings: at home, at school, with friends, and during activities your child usually enjoys. If a teacher, coach, or caregiver notices something different, take note.

Emotional Health and Life Stressors

Children are sensitive to stress and change, whether positive or negative. A new sibling, a change in school, or changes with friends can all cause behavioral changes.

Bullying and assault can also cause changes in your child’s behavior. These aren’t ordinary stressors, and should be addressed. Let your pediatrician know if you suspect bullying—the context matters in how we approach care.

Underlying Conditions

Children with certain conditions may experience more behavioral dysregulation when their underlying needs are not met. These conditions include ADHD, anxiety disorders, autism spectrum disorder, and others. They can also be more irritable when their environment changes or when their treatment needs to be adjusted. If your child has a known condition and their behavior seems worse than their baseline, let your clinician know.

If you believe the irritability or behavior change is linked to a temporary cause—illness, a disrupted schedule, a hard stretch at school—these strategies can help while you monitor the situation.

Start with the basics. Check in on sleep, food, hydration, and symptoms of illness. A tired, hungry, or sick child will be irritable.
Maintain routines and offer comfort. Predictability helps make your child feel safe. A consistent daily routine helps stabilize mood.
Keep up normal rules and expectations. Continue to enforce normal rules, boundaries, and expectations at home and school. Structure is reassuring, even when children are struggling.
Create space for expression. Encourage your child to talk about how they’re feeling without interruptions. Older kids might find it easier to talk while something else is happening (cooking, playing a game, riding in a car) rather than sitting face-to-face. Try not to interrupt; you can address specific things after they’ve finished telling their story.

Prioritize sleep. Tiredness can cause irritability for anyone. Make sure your child is getting the sleep they need according to the American Academy of Pediatrics:

Age	Hours of sleep every 24 hours
4–12 months	12–16 (including naps)
1–2 years	11–14 (including naps)
3–5 years	10–13 (including naps)
6–12 years	9–12
13–18 years	8–10

Encourage physical activity. Physical movement can help decrease stress and increase a child’s sense of control over themselves and the world. Encourage a walk, play, or other activity.
Document what you observe. A few details help your clinician get to the bottom of things. When did this start? How often does it happen? Are there patterns or triggers? What does it look like? Has anything at home or school changed recently?

For Fussy Babies: The 5 S's of Soothing

This proven approach can help soothe fussy babies.

Swaddle: Wrap your baby snuggly in a blanket or age-appropriate swaddler.
Side/stomach hold: Hold your baby on their side, tummy-down, or upright over the shoulder. Always support their head and back.
Shushing: Make a “shhh” sound near their ear repeatedly. This mimics the sounds from the womb and blocks out other noise. White noise machines can also help.
Swinging/swaying: Use gentle, rhythmic motions. Rock your baby in your arms or use a baby swing. Never shake a baby or use forceful movements.
Sucking: Breastfeeding, bottle feeding, or using a pacifier help babies self-soothe.

Please call us if your baby has been crying for more than 3 hours, the quality of the crying seems different than usual, your baby has a fever of 100.4 or higher, or they are showing signs they’re in pain.