When the ER Is Necessary Go to the emergency room immediately after head trauma if you experience any of the following: loss of consciousness lasting more than 30 seconds, repeated vomiting, seizure, worsening headache over hours, increasing confusion or drowsiness, one-sided weakness or numbness, unequal pupils, or clear fluid leaking from the nose or ears (Stiell et al., 2001). These symptoms suggest potential intracranial bleeding, skull fracture, or brain swelling that requires urgent CT imaging and possible neurosurgical intervention. The time window for treating these complications matters. Earlier detection leads to better outcomes. Most concussions do not require emergency department visits. About 90% of head injuries seen in ERs are classified as mild and discharged without intervention. Knowing when the ER is truly necessary saves you unnecessary visits while ensuring you get urgent care when it matters. Immediate ER Criteria (Go Now) Loss of consciousness exceeding 30 seconds. Brief loss of consciousness (seconds) occurs in about 10% of concussions and doesn't automatically require ER evaluation. Unconsciousness lasting over 30 seconds, or any period of unconsciousness followed by confusion, warrants CT imaging to rule out intracranial pathology. Amnesia extending beyond 30 minutes. Not remembering the event itself is common. Not remembering the hours before (retrograde amnesia) or being unable to form new memories afterward (anterograde amnesia) for more than 30 minutes indicates more significant injury requiring imaging. Progressive headache. The distinction is between a stable headache (common, expected) and a headache that steadily worsens over hours despite rest. Progressive headache is the most common symptom of delayed intracranial hemorrhage. Two or more episodes of vomiting. A single episode of nausea or vomiting immediately after impact is common and not alarming. Repeated vomiting, especially developing or continuing hours after injury, indicates rising intracranial pressure. Seizure activity. Any seizure (convulsions, staring episodes, unusual movements) following head trauma requires emergency evaluation regardless of duration. Declining alertness. Increasing sleepiness, difficulty staying awake, or inability to be fully aroused warrants immediate evaluation. Concussion patients should become more alert over time, not less. Focal neurological deficit. Weakness or numbness on one side, slurred speech, visual loss, difficulty walking, or facial asymmetry indicates focal brain injury beyond concussion. Blood thinner use. Patients taking anticoagulants (warfarin, rivaroxaban, apixaban, dabigatran) or antiplatelet agents (clopidogrel) have significantly higher risk of intracranial bleeding after even minor head trauma. ER evaluation with CT imaging is recommended regardless of symptom severity. Urgent Care (Within 24 Hours) These situations don't require an emergency room but need medical evaluation the same day: Persistent confusion beyond 15 minutes. Difficulty answering questions, repeating the same question, or appearing "out of it" for more than 15 minutes warrants same-day medical evaluation. Severe headache responsive to rest. A very bad headache that improves with lying down in a dark, quiet room suggests concussion rather than bleeding, but same-day medical assessment confirms the diagnosis and establishes a monitoring plan. Brief loss of consciousness with full recovery. If consciousness was lost for seconds and recovery is complete, urgent care or same-day primary care evaluation is appropriate rather than the ER. Gentle Movement for Post-Evaluation Recovery After medical evaluation confirms a standard concussion, gentle mobility supports recovery: JME 3 Lateral cervical flexion maintains neck range of motion during early recovery. JME 6 Cervical flexion gently mobilizes the anterior neck structures. JME 17 Neck rotation pattern maintains rotational mobility without straining recovery. JME 48 Shoulder movement breaks up early postural tension from guarding after injury. Start your 14-day free trial for structured recovery-phase mobility routines. Upper Body Mobility After Evaluation JME 62 Shoulder range of motion prevents upper body stiffness during rest phases. JME 152 Thoracic extension restores upright posture after the initial rest period. JME 166 Scapular mobility maintains shoulder blade function during activity restrictions. JME 150 Thoracic rotation keeps the mid-back mobile during the early recovery phase. What Happens in the ER Triage and assessment. You'll be assessed for neurological function: pupil response, orientation (person, place, time, event), motor and sensory examination, and balance. Glasgow Coma Scale scoring categorizes injury severity. CT imaging decision. Not every patient gets a CT scan. The Canadian CT Head Rule guides imaging decisions based on specific criteria. If you meet criteria, a CT scan takes about 5 minutes and identifies bleeding, fractures, and brain swelling. Observation period. Even with a normal CT, you will be observed for 4-6 hours if symptoms are concerning. Serial neurological checks confirm stability before discharge. Discharge instructions. If discharged, you'll receive specific return criteria (when to come back), activity restrictions, and follow-up recommendations. Follow these instructions precisely, especially the return criteria. The 48-Hour Watch Period After an initial normal evaluation, the highest-risk period for delayed complications extends 48 hours: Have someone monitor you. A responsible adult should check on you every 2-4 hours for the first 24 hours, including waking you once during the first night. They should assess alertness, orientation, and symptom progression. Track symptoms regularly. Rate headache, nausea, confusion, and drowsiness every 2-4 hours. Document scores so you can report trends to your healthcare provider. Stable or improving scores are reassuring. Return immediately if red flags develop. The normal CT at hour zero doesn't guarantee no bleeding develops at hour 12. Delayed presentations occur, especially in older adults and patients on blood thinners. New red flag symptoms during the 48-hour window require re-evaluation. Support your post-evaluation recovery with simplmobility's guided mobility programs. Do all concussions need an ER visit? No. About 80-90% of concussions are manageable through primary care or urgent care evaluation. ER visits are specifically indicated for red flag symptoms (progressive headache, vomiting, seizure, declining consciousness) or high-risk factors (blood thinner use, dangerous mechanism, prolonged amnesia). Will the ER do a brain scan for my concussion? CT scans are ordered based on clinical criteria, not automatically for every concussion. If you have specific risk factors or red flag symptoms, imaging is performed. A normal CT rules out bleeding and fractures but doesn't diagnose concussion, which is diagnosed clinically by symptom pattern. What if my symptoms seem mild but I'm worried? Trust your concern. If something feels wrong after head trauma, seeking evaluation is appropriate. Urgent care or a same-day primary care appointment addresses milder presentations without the wait and cost of the emergency department. Many sports medicine clinics offer same-day or next-day concussion evaluations. Should children go to the ER more readily than adults? Children under 2 years old should be evaluated in the ER after any head trauma producing symptoms. For older children, the same red flag criteria apply but with lower thresholds: any vomiting (not requiring repetition), any behavioral change noted by parents, and any loss of consciousness warrant ER evaluation in pediatric patients. References Stiell, I. G., et al. (2001). The Canadian CT Head Rule for patients with minor head injury. The Lancet, 357(9266), 1391-1396. PubMed Kuppermann, N., et al. (2009). Identification of children at very low risk of clinically-important brain injuries after head trauma. The Lancet, 374(9696), 1160-1170. PubMed