How To Tell If Infant Has Concussion? Guide

An infant cannot tell you they have a headache, feel dizzy, or see blurry. That is why recognizing a concussion in a baby depends almost entirely on what you observe. The clearest signs are a change in behavior from their normal baseline, vomiting, unusual sleepiness, or a blank, unfocused look. If your baby hits their head and then acts differently in any way, treat it as a possible concussion and call your pediatrician or seek emergency care right away.

How To Tell If Infant Has Concussion

A concussion is a mild traumatic brain injury. It happens when the brain moves inside the skull, usually from a bump, a fall, or a sudden jolt. In infants, the brain is still developing and the neck muscles are weak, so even a short fall can produce enough force to cause one.

The problem is that infants cannot report symptoms. Diagnosis relies on what caregivers notice. Doctors call this a change from baseline — meaning anything that is different from how your baby normally acts.

Watch for these signs after any head impact:

• Vomiting, especially more than once
• Acting dazed, blank, or not tracking movement with their eyes
• Unusual sleepiness or difficulty waking them
• Crying that will not stop, or the opposite — unusual quiet and stillness
• Refusing to feed or eating far less than normal
• Irritability that is clearly out of character
• Pale or flushed skin
• A bulge or soft spot that feels different than usual on the top of the head
• Unequal pupil sizes
• Any loss of consciousness, even briefly

One symptom alone may mean nothing. A combination, or any symptom that appears right after a fall, matters more. The timing is a clue. Symptoms that start within hours of a head impact are more concerning than ones that appear days later with no injury.

What Is the Difference Between a Concussion and a More Serious Head Injury?

A concussion is the mildest form of traumatic brain injury. A more serious injury involves bleeding or swelling inside the skull. Both can start with similar symptoms, and only imaging or a clinical exam can tell them apart.

Some signs point more toward an emergency than a simple concussion. Get emergency help immediately if your baby:

• Loses consciousness for any length of time
• Has a seizure
• Vomits repeatedly
• Has pupils that are different sizes
• Cannot be woken up
• Has clear fluid or blood coming from the nose or ears
• Has a large, growing soft swelling on the head
• Shows weakness or uses one side of the body less than the other

These signs suggest bleeding or pressure inside the skull, which is a medical emergency. Do not wait to see if it improves. Call 911 or go to the nearest emergency department.

Here is a point many parents miss: a baby can seem completely fine right after a fall and still develop symptoms hours later. That is why observation over the next 24 to 48 hours matters as much as the first few minutes.

When Should You Call a Doctor After a Baby Hits Their Head?

Call your pediatrician after any head injury that concerns you, even if your baby seems normal. Doctors generally want to know about falls from a height, a hard surface, or any impact followed by a behavior change.

For a minor bump with no symptoms and a baby who acts completely normal, many clinicians suggest watching closely at home. But the threshold for calling should be low in infants, because they cannot tell you how they feel.

Call right away if your baby is under 6 months old, since symptoms can be harder to read and the risk of a serious injury is higher. Also call if the fall involved a hard surface, a drop from more than a short distance, or if you are unsure how the injury happened.

If you are ever unsure whether to call, call. A nurse line or pediatric office can help you decide whether your baby needs to be seen. There is no downside to asking.

What Should You Watch For in the First 24 to 48 Hours?

The first two days after a head injury are the most important window for watching symptoms. Most concussions show signs within this period, though some symptoms can take longer to appear.

Check on your baby regularly, including during sleep. It is a common myth that you must keep a baby awake after a head injury. In fact, sleep is not harmful, and waking a sleeping baby every hour is not necessary. What matters is that you can rouse them normally.

To check, gently wake your baby. A baby with a concussion may be sleepy but should still respond to being woken, focus on you, and settle back to sleep. A baby who cannot be woken or who stays limp and unresponsive needs emergency care.

Keep a simple log of feeding, sleeping, and behavior. This makes it easier to spot a pattern that is off. If your baby eats less, sleeps far more, or acts different in any consistent way, call your doctor.

How Is a Concussion Diagnosed in an Infant?

There is no single test that confirms a concussion. Diagnosis is clinical, meaning it is based on the history of the injury and a physical and neurological exam.

Your doctor will ask how the injury happened and what symptoms you noticed. They will check your baby’s alertness, pupil response, muscle tone, and how your baby moves and responds to stimulation.

Imaging such as a CT scan is not used for every head injury. It is typically reserved for cases where there are signs of a serious injury, like repeated vomiting, a seizure, or a change in consciousness. This is because imaging exposes an infant to radiation, so doctors use it only when the benefit clearly outweighs the risk.

For most mild head injuries with no red-flag signs, a doctor may simply recommend close observation at home and a follow-up if symptoms change.

What Does Recovery Look Like for a Baby With a Concussion?

Most infants recover well from a mild concussion. The brain is resilient, and with rest and time, symptoms usually ease over days to a few weeks.

Recovery for a baby is mostly about rest and normal routine. Keep things calm and avoid overstimulation. Let your baby sleep when tired. Feed on demand.

Some babies are more fussy or sleepy for a while. That is expected. What is not expected is getting worse. If symptoms increase instead of improve, call your doctor.

It is worth being honest about the evidence here: research on concussion recovery specifically in infants is limited, because most studies focus on older children and adults. The general approach — rest, observation, and follow-up — is based on how concussions are managed across ages, not on large trials in babies alone.

How Can You Reduce the Risk of Head Injuries in Infants?

Most infant head injuries happen during everyday moments — falls from a bed, changing table, or couch, or a drop while being carried. Prevention focuses on those moments.

• Never leave a baby unattended on a bed, couch, or changing table, even for a second
• Use a properly installed car seat for every ride
• Keep one hand on your baby when they are on a raised surface
• Clear floors of hard objects and use gates near stairs once your baby is mobile
• Follow safe sleep guidelines to reduce other risks

No prevention method removes all risk. Babies move suddenly and unpredictably. The goal is to lower the chance of a serious fall, not to eliminate every bump.