Toddlers can’t tell you they have a headache or feel dizzy, so spotting a concussion means watching their behavior closely after any bump, blow, or jolt to the head. The signs are often subtle, and some may not appear for hours. Knowing what to look for, what counts as an emergency, and how to help your child recover can make a stressful situation much more manageable.
Why Concussions Are Harder to Spot in Toddlers
Older kids and adults can describe symptoms like blurred vision, foggy thinking, or a pounding headache. A one- or two-year-old can’t do any of that. You’re relying entirely on observable changes in how your child acts, moves, eats, and sleeps. That means the single most important diagnostic tool is you: no one knows your child’s normal behavior better than you do, and “not acting normally per parents” is actually one of the clinical criteria doctors use when evaluating head injuries in children under two.
Behavioral and Physical Signs to Watch For
After a head injury, look for any combination of these changes:
- Unusual fussiness or inconsolable crying. All toddlers cry after a scare, but crying that won’t stop no matter what you try is a specific warning sign the CDC highlights for this age group.
- Vomiting. A single episode of vomiting right after a bump isn’t uncommon and may not be alarming on its own. Repeated vomiting is a red flag.
- Changes in balance or coordination. Toddlers are already wobbly, but watch for noticeably clumsier walking, trouble picking things up, or a sudden reluctance to move around.
- Altered alertness. Excessive drowsiness, staring blankly, seeming confused, or not recognizing familiar people or places.
- Refusing to eat or nurse. This is another sign the CDC specifically flags for infants and toddlers.
- Changes in sleep. Sleeping far more than usual, or difficulty falling asleep.
- Loss of interest in play. A toddler who normally runs around but suddenly sits listlessly, or who won’t engage with a favorite toy, is telling you something.
These signs can appear immediately or develop over the next several hours. Keep watching your child closely for at least 24 to 48 hours after the injury, even if they seem fine at first.
Danger Signs That Need Emergency Care
Some symptoms point to something more serious than a mild concussion, like bleeding or swelling inside the skull. Call 911 or go to the emergency department if you notice any of the following:
- Seizures (shaking or twitching)
- Loss of consciousness or increasing drowsiness where your child can’t be woken up or can’t stay awake
- Repeated vomiting
- One pupil larger than the other
- Slurred speech, weakness, or numbness
- A large, soft swelling on the head (especially on the side or back of the skull rather than the forehead)
- Increasing confusion, restlessness, or agitation that worsens rather than improves
In toddlers specifically, inconsolable crying that doesn’t let up and a complete refusal to eat or nurse are also reasons to seek emergency evaluation.
What Happens at the Doctor’s Office
When you bring your toddler in after a head injury, the doctor will assess their level of alertness, check for signs of a skull fracture (by feeling the scalp), and ask you detailed questions about what happened and how your child has been acting since. For children under two, doctors use a validated set of criteria called the PECARN rules to decide whether imaging is needed.
If your toddler is alert, acting normally, has no palpable skull fracture, no large swelling on the side or back of the head, was not knocked unconscious for five seconds or more, and didn’t experience a severe mechanism of injury (like a fall from several feet), they fall into the very low risk category. In these cases, a CT scan is typically unnecessary. Children at intermediate risk, where one or two of those factors are present, may be observed in the clinic for a period rather than scanned immediately. High-risk cases get imaging right away.
Doctors are cautious about CT scans in young children because of radiation exposure, so observation is preferred whenever it’s safe. That’s also why your description of your child’s behavior matters so much during the evaluation.
What “High Risk” Injuries Look Like
Not every bump on the head carries the same risk. Falls from heights greater than three feet, impacts involving hard surfaces or fast-moving objects, and car accidents are considered severe mechanisms of injury. A toddler tumbling off a couch onto carpet is a very different scenario than falling off a countertop onto tile. The location of the bump matters too. Swelling on the forehead is less concerning than a large hematoma on the side or back of the skull, because fractures in the temporal and occipital areas are more likely to involve underlying bleeding.
Monitoring Your Toddler at Home
If your child seems fine after a bump or has been evaluated and sent home, your job is to watch for new or worsening symptoms over the next day or two. Here’s what that looks like in practice: check on your child regularly, note how they’re eating and playing, and trust your instincts if something feels off.
One common worry you can let go of: you do not need to wake your toddler up periodically while they sleep. This is old advice that has been retired. Sleep actually helps the brain heal, so let your child rest. The exception is if their doctor specifically tells you otherwise based on the particular injury.
What you are watching for is any of the danger signs listed above, or a general worsening trend. A child who seemed okay at first but becomes increasingly lethargic, vomits repeatedly, or develops coordination problems needs to be seen again.
Recovery: What to Expect
Most children recover from a concussion quickly. The CDC notes that most kids can return to school or daycare within one to two days, and that delaying return may actually lead to a longer recovery. The old approach of locking a child in a dark, quiet room for days has been replaced by a much more active model.
In the first one to two days, limit screen time and avoid activities that are physically or mentally demanding. But don’t isolate your child. Let them do light physical activity like short walks, even if they still have mild symptoms. If symptoms get worse during an activity, scale back temporarily, but don’t stop altogether.
For toddlers specifically, recovery guidance can be tricky because they can’t articulate how they feel. Watch their behavior as a proxy. A toddler who is back to playing normally, eating well, and sleeping on their regular schedule is showing you they’re recovering. One who remains unusually clingy, irritable, or disinterested in their usual activities may need more time or a follow-up visit.
When a Bump Is Probably Just a Bump
Toddlers fall constantly. Most head bumps do not cause concussions. If your child cries for a few minutes, calms down with comfort, and then goes right back to playing normally, that’s reassuring. A small bump or bruise on the forehead that doesn’t grow rapidly, with no vomiting, no change in behavior, and no loss of consciousness, is the most common scenario, and it rarely requires medical evaluation.
The key distinction is change. You’re not looking for a single symptom in isolation. You’re looking for your child to act differently than they normally do, in a way that persists or worsens, after a head injury. That pattern is what separates a concussion from a routine bump.