Concussion Signs Every Parent Should Know: The First 24-Hour Guide

Written by Dr. Rob Letizia, PT, DPT - post-concussion specialist serving athletes and families across North Jersey.

If your child just took a hit to the head - at practice, in a game, on the playground, or in a fall - you have a narrow window where the right decisions matter most. Every parent should know exactly what to watch for in the first 24 hours, what is urgent, and what can wait until morning.

The First 15 Minutes: Red Flags That Mean Emergency Room Now

These are the signs that require immediate emergency medical evaluation:

• Loss of consciousness of more than 30 seconds or any difficulty waking them
• Severe or rapidly worsening headache
• Repeated vomiting (more than 1-2 times)
• Seizure or convulsion of any kind
• Slurred speech, confusion, or unusual behavior lasting more than a few minutes
• Weakness, numbness, or tingling in an arm or leg
• Unequal pupils (one larger than the other)
• Neck pain with midline tenderness or any tingling in the arms or legs
• Clear fluid from the ear or nose

Any one of these warrants 911 or an immediate ER visit. Do not drive them yourself if any of the symptoms involve decreased consciousness.

The First Hours: Likely Concussion Signs

These do not require ER but should be taken seriously and evaluated within 24-48 hours:

• Brief headache, dizziness, or feeling "off"
• Difficulty concentrating or "brain fog"
• Sensitivity to light or noise
• Nausea without vomiting
• Mild balance issues
• Emotional changes - irritability, sadness, anxiety
• Sleep disturbance on the first or second night
• Not "feeling like themselves"

What To Do in the First 24 Hours

Do:

• Rest physically and cognitively for the first 24-48 hours (but not longer - extended rest is harmful)
• Monitor for red flag symptoms and check in every few hours
• Apply ice for any neck or head impact site (20 minutes on, 20 off)
• Hydrate well and encourage small, regular meals
• Keep lights dim and environment calm if that helps
• Let them sleep - the old advice to "keep them awake" is not current

Do not:

• Give ibuprofen or aspirin in the first 24 hours (Tylenol is acceptable)
• Let them return to sport or any contact activity for at least 24-48 hours even if they feel fine
• Allow them to drive
• Assume they are fine because they feel fine immediately after

When to Start Physical Therapy

If symptoms persist beyond 10-14 days (or 4 weeks in younger children), do not wait. Research consistently shows that early structured rehabilitation produces significantly better outcomes than extended rest. The old "wait and see if it resolves on its own" advice is outdated.

A qualified concussion physical therapist can identify which of the 4 domains - vestibular, cervical, autonomic, or ocular-motor - are driving the persistent symptoms and build a targeted program to resolve them in weeks rather than months.

The Bottom Line

In the first 24 hours after your child's head injury, your job is to watch for red flags and rest them properly. After 48-72 hours, if symptoms are still present, it is time to move toward active evaluation and rehabilitation. Call (973) 689-7123 or learn more about the Spectrum Therapeutics post-concussion program.