Short answer
Concussion symptoms after a crash can appear immediately or over the next several days: headache, dizziness, nausea, confusion or memory gaps, sensitivity to light and noise, sleep changes, trouble concentrating, and irritability or mood changes. Get evaluated the same day, go back if symptoms persist or worsen, and treat a worsening headache, repeated vomiting, confusion, weakness, or slurred speech as an emergency.
Answered by Kweku Darfoor, Esq., founder of The Injury Advocates, a Plantation-based personal injury law firm serving Fort Lauderdale, Broward County, and South Florida. General information, not legal advice about your situation.
You do not need to lose consciousness to have a concussion. Most people who are concussed never black out. Feeling dazed, “seeing stars,” or having a gap in memory around the crash are all signs of injury.
Some symptoms can mean bleeding or swelling inside the skull. Call 911 or go to the nearest emergency room for a headache that keeps getting worse, repeated vomiting, a seizure, slurred speech, weakness or numbness in an arm or leg, increasing confusion or agitation, one pupil larger than the other, unusual drowsiness or an inability to wake the person, or clear fluid draining from the nose or ears. Older adults and anyone taking blood thinners are at higher risk of a delayed brain bleed, which can develop hours or days after an impact that seemed minor.
Adrenaline masks a great deal in the first hours after a crash. Swelling and the chemical changes that follow a brain injury evolve over days, and many symptoms only become obvious when you return to normal demands: a full day of work, a computer screen, driving, a noisy restaurant. That delay is medically normal. It is also the gap insurance adjusters use to argue that the injury came from something else, which is why the first medical visit, and the symptoms you report at it, matter so much.
In Florida, your own personal injury protection (PIP) coverage pays initial medical bills after a crash only if you receive treatment within 14 days. Benefits beyond $2,500 require a qualified provider to determine that you had an emergency medical condition, and head-injury symptoms documented at the first visit are often what support that determination. Beyond PIP, a prompt visit creates the baseline record that every later specialist, and every later argument with an insurer, refers back to. Why you must see a doctor immediately after a crash →
Most people recover from a concussion within a few weeks with rest, a gradual return to activity, and follow-up care. A meaningful share do not: when symptoms last for months, doctors call it post-concussion syndrome, and treatment may involve a neurologist, vestibular or vision therapy, cognitive rehabilitation, and help with sleep and mood. A second head injury before the first has healed can be far more serious, so return to sports and physically demanding work should be cleared by a doctor.
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Usually within hours, but it is common for symptoms to become obvious over the following two or three days, once the adrenaline wears off and you try to work, read, or look at a screen. Any symptom that appears or worsens in the days after a crash should be reported to a doctor and tied to the accident in the record.
Yes, the same day if possible. Some brain injuries, including slow bleeds, do not announce themselves immediately, and in Florida your PIP benefits depend on receiving treatment within 14 days of the crash. A documented visit also establishes the baseline every later claim refers back to.
