If you notice symptoms after leaving a crash, tell a medical professional when they began and how they have changed. Do not delay care to create a better record. A simple, accurate timeline is more useful than trying to make every symptom fit the moment of impact.
You might have told someone at the scene that you felt all right. Later, something feels different. Preserve that sequence honestly. This article helps you describe it; it cannot tell you what caused a symptom or whether it is safe to wait.
Medical questions come before insurance explanations
The CDC explains that some concussion symptoms can appear hours or days after an injury. That does not mean every later headache or other symptom is a concussion or was caused by a collision. A clinician needs to assess your situation.
Seek immediate emergency care for danger signs such as a worsening headache that does not go away, repeated vomiting, weakness, seizures, unusual confusion or difficulty waking. Call 911 in an emergency. The CDC page gives additional signs; it is not a complete guide to every injury.
Our article on medical attention after a car accident discusses the broader care question. Do not use an article, a diary or an insurer’s request as a substitute for medical advice.
Write down the first time you noticed the change
Use an approximate time if that is all you know. “The next morning, when getting dressed” is clearer than assigning an exact hour you cannot remember. Say when you wrote the note too, especially if you are reconstructing an earlier day.
- What you noticed, in ordinary words.
- When you first noticed it and what you were doing.
- Whether it changed, improved or returned.
- When you contacted a provider and what instructions you received.
- Which activity became harder, and how.
Keep previous injuries, existing symptoms and later events in the account. Omitting them makes the timeline less useful to the people trying to understand it.
Separate a symptom from a diagnosis
You can describe dizziness, soreness or difficulty concentrating without knowing the medical explanation. Record what the clinician actually tells you, and keep the discharge or visit instructions. Do not turn a possible diagnosis into a confirmed one in an insurance message.
If you notice a mistake in a medical record, ask the provider how to request a correction or add your concern. Keep the original and the request. Do not alter a downloaded record yourself and present it as the provider’s document.
A short timeline you can bring to an appointment
- Collision: date, approximate time and what you remember happening.
- At the scene: symptoms noticed then, or “none noticed at that time.”
- First change: symptom, approximate onset and context.
- Since then: changes and specific effects on sleep, movement, work or daily tasks.
- Care: calls, visits, instructions and follow-up questions.
Leave a blank or write “not sure” where memory is incomplete. Bring the timeline to help the conversation, not to tell the clinician what conclusion to reach.
Explain gaps without guessing or making excuses
If you could not get an appointment, were waiting for a callback or misunderstood an instruction, keep the actual messages and explain what happened. There is no universal number of hours or days that this article can use to decide a claim.
A treatment timeline is also different from a settlement estimate. Our soft-tissue injury guide explains why a label or online average cannot value an individual case.
For the injury-claim side, see our Los Angeles car-accident page or Tell John what happened. Medical emergencies belong with emergency services, not a website form.
General information, not medical or legal advice. This article does not diagnose an injury, establish its cause or tell you whether a symptom can safely wait.



