What Is Abusive Head Trauma?

Abusive head trauma is a head or neck injury from physical child abuse. It happens when someone shakes a baby or hits the baby against something hard. Most cases happen when a parent or caregiver is angry, tired, or upset because a baby won't stop crying or the child can't do something they expect, like toilet train.

These injuries can cause permanent brain damage or death. People should never shake a baby for any reason.

Which Children Are at Risk for Abusive Head Trauma?

Most cases of abusive head trauma (also called shaken baby syndrome) happen to babies and toddlers younger than 2 years old. Rarely, it can happen in children up to 5 years old. It can happen to boys or girls in any family.

At special risk for abuse are children who have a lot of special needs or health problems that make them cry a lot, like colic and GER.

How Does Abusive Head Trauma Happen?

Things like gently bouncing a baby on a knee or riding in a bumpy car won't cause the problems seen in abusive head trauma.

Abusive head trauma happens when someone: 

  • uses force to shake a child 
  • uses force to throw or drop a child on purpose
  • hits the child's head or neck against an object, like the floor or furniture, or hits the child's head or neck with an object

Shaking a baby is so harmful because:

  • Infants have poor neck strength and their heads are large compared with the size of their bodies. This lets the head move around a lot when shaken.
  • When the head moves around, the baby or child's brain moves back and forth inside the skull. This can tear blood vessels and nerves inside or around the brain, causing bleeding and nerve damage.
  • The brain may hit against the inside of the skull, causing brain bruising and bleeding on the outside of the brain.
  • Brain swelling builds pressure in the skull. This pressure makes it hard for blood, carrying oxygen and nutrients, to reach the brain, further harming it.

What Are the Signs of Abusive Head Trauma?

In the most severe cases, babies and children may come to the ER, hospital, or doctor's office not awake, having seizures, or in shock.

In less severe cases, a shaken child may:

  • move less than usual
  • be cranky and hard to comfort
  • throw up
  • have trouble sucking or swallowing
  • eat less than usual
  • not smile or coo
  • seem stiff
  • have seizures
  • have trouble breathing
  • have skin that looks blue
  • have pupils (the dark spots in center of the eyes) that aren't the same size
  • be unable to lift their head
  • have trouble focusing their eyes or tracking movement

How Is Abusive Head Trauma Diagnosed?

Parents or caregivers often won't say that the child was shaken or hit, so doctors may not know to check for head injury. Many signs of abusive head trauma, like fussiness and throwing up, are common in routine childhood illnesses. So it can be hard for doctors to figure out that a baby was harmed.

If abusive head trauma is suspected, doctors will:

  • Do an eye exam to look for bleeding inside the eyes.
  • Order X-rays of all the bones to look for new or healing breaks, which happen most in the arms, legs, skull, and ribs.
  • Order a CT or MRI of the head to look for:
    • broken bones in the head (skull fractures)
    • brain swelling
    • brain bleeding

What Can Happen to a Baby With Abusive Head Trauma?

Abusive head trauma often causes life-long harm to the brain and, sometimes, death.

Babies and children who survive may have:

  • poor eyesight or blindness
  • hearing loss
  • seizures
  • delayed development
  • problems with speech and learning
  • problems with memory and focus
  • cerebral palsy
  • weakness or problems moving parts of the body
  • problems with hormones controlled by the brain

If a child's problems are mild, they might not be noticed until the child starts school and has problems with learning, focus, or behavior.

What Can Help a Child With Abusive Head Trauma?

After abusive head trauma, a child may need long-term care from a team of health experts, such as:

  • brain doctors (neurology)
  • brain surgeons (neurosurgery)
  • eye doctors (ophthalmology)
  • hormone doctors (endocrinology)

They also need a pediatrician who can manage their ongoing complex care. They also might need support from therapists, such as:

Before age 3, a child can receive free speech therapy or physical therapy through state-run programs. After age 3, the child's school district's provides any needed special educational services.

As kids get older, they may need special schooling and ongoing help to build language and daily living skills, like dressing.

What Else Should I Know?

Abusive head trauma is 100% preventable. A key part of prevention is increasing awareness of the dangers of shaking:

  • Tell people caring for your baby to never shake the baby.
  • Talk about normal crying so a caregiver is less likely to get upset.
  • Talk about safe ways to calm a baby, such as swaddling, rocking, or singing.
  • Let caregivers know it's OK to put the baby or child in a safe place, walk away and take a break.
Back to Articles

Related Articles

What to Do When Babies Cry

During the first 3 months of life, babies cry more than at any other time. Here's how to soothe them.

Read More


Colic is common in babies - but that doesn't make it easier for parents to handle. Learn what colic is, what causes it, and what you can do about it.

Read More

Choosing and Instructing a Babysitter

One of your most important tasks as a parent is finding a qualified babysitter. Here are some essential tips on choosing and instructing a babysitter.

Read More

Child Abuse

Child abuse — whether it's physical, sexual, emotional, medical, or another type — can harm kids in many ways. Learn how to spot the signs of child abuse.

Read More

Sudden Infant Death Syndrome (SIDS)

SIDS is the leading cause of death among infants 1 month to 1 year old. Though SIDS remains unpredictable, you can help reduce your infant's risk.

Read More

What You Need to Know in an Emergency

In an emergency, it's hard to think clearly about your kids' health information. Here's what important medical information you should have handy, just in case.

Read More

Postpartum Depression

It's important for new mothers – and those who love them – to understand the symptoms of postpartum depression and reach out to family, friends, and medical professionals for help.

Read More

Failure to Thrive

Most kids grow well but some have ”failure to thrive.” This means they don't gain weight as expected and may not grow as tall as they should.

Read More

Helping Your Child Heal After a Trauma

Traumas are serious events that cause kids to fear for their life or safety. But kids can recover after trauma. There is therapy that can help. Kids also need extra support and comfort from parents.

Read More

Posttraumatic Stress Disorder (PTSD)

Kids and teens who live through a traumatic event can develop posttraumatic stress disorder (PTSD). Healing is possible with the help of professional counseling and support from loved ones.

Read More

Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.