Concussion Symptoms
When It’s an ER Emergency

What a concussion is

A concussion is a mild traumatic brain injury (mTBI) caused by a bump, blow, or jolt that makes the brain move quickly inside the skull. Doctors call it “mild” because it is usually not life-threatening, but that does not mean it is minor or safe to ignore. The effects can still be serious.

Common concussion symptoms

Common symptoms can affect how you feel, think, act, or sleep. These may include:

• Headache
• Dizziness or balance problems
• Nausea or vomiting
• Feeling foggy, groggy, or slowed down
• Trouble concentrating or remembering
• Sensitivity to light or noise
• Blurred vision
• Fatigue
• Irritability or feeling more emotional
• Sleeping more or less than usual

Symptoms are different for each person, and they may change during recovery.

One important truth: CT does not diagnose a concussion

This is where many concussion pages get sloppy. A concussion is usually diagnosed from the history, symptoms, and neurologic exam. A CT scan is not used to “prove” a concussion. CT is used when the clinician is worried about something more dangerous — such as bleeding, swelling, or a skull fracture — especially when red-flag symptoms are present. In children, CDC specifically says imaging should not be used routinely to diagnose mild TBI.

What Post Oak ER can do for a concussion or head injury

At Post Oak ER, concussion evaluation may include:

• A focused head injury and neurologic exam
• Assessment of memory, balance, coordination, and symptoms
• On-site CT when the injury pattern or red flags make imaging appropriate
• Pediatric and adult emergency care
• IV treatments if symptoms such as nausea, vomiting, or dehydration need support
• Trauma-focused emergency evaluation when the head injury is part of a fall, sports injury, or accident

That is the accurate way to position this page. Post Oak ER can credibly say it offers rapid head injury evaluation and on-site CT when medically needed. It should not claim that CT “diagnoses concussion,” because that is not medically correct.

ER or “watch at home”?

Not every minor head bump needs a 911 call. But if there are danger signs, worsening symptoms, or the patient is acting differently after the injury, ER evaluation is the safer choice. Mayo says even when emergency care is not required, a head injury should still be assessed by a healthcare professional within 1 to 2 days, and children and teens should be seen by someone trained to evaluate pediatric concussions.

What recovery usually looks like

Most people with a mild TBI or concussion feel better within a couple of weeks, but symptoms can last longer in some patients. During recovery, symptoms may change over time. CDC says patients should seek emergency care if danger signs appear, and otherwise recovery is usually a gradual process.

Rest matters — but total shutdown is outdated advice

Older advice often told people to stay in a dark room and do nothing. That is no longer the best way to describe recovery. Mayo notes that complete rest is not recommended, and CDC advises a gradual return to non-sports activities after no more than 1 to 2 days of rest in children. In other words: early recovery should be careful and symptom-guided, not reckless — but also not total shutdown forever.

Sports, school, and work: do not rush back

If the concussion happened during sports, the athlete should be removed from play right away and should not return the same day. CDC says return to sports should happen only with approval and supervision from a healthcare provider, using a stepwise progression, and each step typically takes at least 24 hours.

A practical reminder for parents and adults

If someone “just doesn’t seem right” after a head injury, trust that concern. Concussions do not always look dramatic. A person can have no major outside wound and still have a meaningful brain injury that needs evaluation — or a more serious problem that first looks like a “simple concussion.”