Accidents move fast. This guide doesn't. Every step below is attorney-reviewed and specific to Los Angeles, California law — so you don't miss what matters.
Los Angeles traffic moves fast and stops hard — rear-end collisions on the 405, PCH, and the 10 are among the most common sources of whiplash, spinal disc injuries, and concussions that don't announce themselves until 24–72 hours after impact.
Feeling fine immediately after a crash is common and does not weaken your legal claim. Adrenaline suppresses pain signals during trauma, and injuries like whiplash, spinal disc herniation, and mild traumatic brain injury (mTBI) typically develop symptoms 24–72 hours after impact — sometimes weeks later.
California recognizes this medically and legally. The statute of limitations under CCP § 335.1 gives you 2 years from the accident date. Under the "discovery rule," courts may extend this window if the injury itself was not reasonably discoverable at the time of the crash.
- See a doctor within 24 hours, even if you feel mostly okay — urgent care and emergency room visits both create the causation record your claim depends on
- Document every symptom in writing as it develops: date, time, location, description, and how it affects your daily life
- Do not give a recorded statement to any insurer before you have completed your initial medical evaluation — early statements capture your lowest-symptom moment
A 3-day gap between the accident and your first doctor visit is routinely cited by California insurers to dispute causation entirely. Do not give them that gap.
Quick Answer — Source Index3§ 1 LAW◎ 2 GOVclaim-level sources
California Code of Civil Procedure § 335.1 — Statute of Limitations (Personal Injury)California Code of Civil Procedure § 335.1✓ Official (source-only)
NHTSA — Whiplash and Rear-Impact Crash DataNHTSA✓ Official (source-only)
Brain Injury Association of America — mTBI Symptom GuideBrain Injury Association of America✓ Official (source-only)
Check My Case Value & Protect My Claim →
Free · No obligation · 24/7 intake open
⚡ Free · No Obligation
See If You Qualify in 60 Seconds
Step 1 — Select accident type
What type of accident were you in?
What You're Experiencing
You walked away from the accident feeling shaken but okay. Then, 24 to 72 hours later — or several days after — you developed neck stiffness, headaches, back pain, numbness in your arms or legs, trouble sleeping, or difficulty concentrating. You're wondering whether these symptoms are from the accident, whether it's too late to see a doctor, and whether you still have a claim.
What This Likely Means
- If you have neck stiffness, headaches, or shoulder pain within 72 hours → this is consistent with whiplash, the most common soft-tissue injury in rear-end and side-impact collisions
- If you have lower back pain, leg numbness, or radiating pain down your arms or legs → this may indicate a spinal disc herniation from axial compression during the impact
- If you have persistent headaches, cognitive fog, memory gaps, or trouble concentrating → these are common presentations of mild traumatic brain injury (concussion), even without any loss of consciousness at the scene
- If you have abdominal pain, tenderness, or bruising across your midsection from the seatbelt → this is a potential emergency; internal organ injuries can present with delayed symptoms — go to the ER
- If you are experiencing anxiety, flashbacks, intrusive thoughts, or sleep disturbance → post-traumatic stress disorder (PTSD) is a recognized injury in California personal injury claims and is fully compensable
Your Options
You Can Do This
- •Start a symptom diary immediately — date, time, pain level 1–10, and how each symptom affects specific daily activities like driving, working, or sleeping
- •Schedule urgent care or a primary care visit within 24 hours of any symptom appearing, even if it seems minor; tell the provider it started after a car accident
- •Avoid saying 'I feel okay' or 'I'm not sure if I'm hurt' to any insurance representative until your medical evaluation is complete
Attorney Handles
- •Order and analyze your complete medical records to ensure all diagnoses are accurately connected to the accident mechanism
- •Retain specialists (neurologists, orthopedic surgeons, radiologists) to formally connect specific injuries to the biomechanics of your crash
- •Calculate non-economic damages — pain and suffering, loss of enjoyment of life — based on documented injury severity, duration, and functional impact
Avoid Doing This
- •Don't give a recorded statement to any insurer until you've completed your initial medical evaluation — early statements lock in your best-day baseline
- •Don't accept any settlement offer before reaching Maximum Medical Improvement (MMI) — you don't yet know the full cost or duration of your care
- •Don't miss follow-up appointments — gaps in your treatment record are used to argue that your injuries resolved or were not serious
What This Typically Costs
Emergency room visit (no surgery): $1,500–$5,000. Urgent care visit: $100–$300. Physical therapy in LA (per session): $75–$200. MRI (spine or brain): $800–$2,500 without insurance. Chiropractic care (per session): $65–$150. Factors that raise out-of-pocket costs: surgical intervention, specialist referrals, extended PT. Factors that lower costs: medical liens (treatment on credit against your eventual settlement), health insurance, MedPay coverage included in your auto policy.
When to Call a Professional
Contact an attorney immediately if any of these apply:
- 1
You have abdominal pain, bruising across your midsection, or blood in your urine after the accident — go to the ER immediately, do not wait
- 2
You have a worsening headache, confusion, vision changes, or difficulty speaking — seek emergency care now; these may indicate intracranial bleeding
- 3
Symptoms appeared more than 7 days after the accident — contact a personal injury attorney before contacting any insurer; the causation argument requires careful documentation
- 4
Your symptoms are affecting your ability to work — document lost wages starting now; wage loss is a fully recoverable damage in California
- 5
An insurer has already recorded you saying 'I feel fine' — contact an attorney immediately to understand how to document the subsequent symptom development and protect your claim
Not sure what step to take next?
Our free 60-second intake connects you with a verified LA specialist — no obligation.
Get Free Case Review →Key Numbers
| Metric | Value | Source |
|---|---|---|
| Whiplash symptom onset after impact | 24–72 hours (sometimes up to 2 weeks) | Journal of Emergency Medicine / National Institute of Neurological Disorders and Stroke |
| California statute of limitations — personal injury | 2 years from accident date | CA Code of Civil Procedure § 335.1 |
| Treatment gap used by CA insurers to dispute causation | 72+ hours without medical visit | California personal injury claims practice |
| mTBI (concussion) — delayed or no immediate symptom rate | 30–40% of cases | Brain Injury Association of America (biausa.org) |
| Americans experiencing whiplash injury annually | ~2 million | NHTSA (nhtsa.gov) |
Common Mistakes to Avoid
- 1
Mistake #1: Waiting to see a doctor until symptoms become severe.
Adrenaline can suppress pain for hours to days. Waiting until symptoms peak before seeking care creates a treatment gap that California insurers use as evidence that your injuries were not caused by the accident — or were pre-existing.
See a doctor within 24 hours of any symptom appearing, even if it seems minor. Document every symptom as it develops.
- 2
Mistake #2: Giving a recorded statement before your injury picture is complete.
Adjusters call in the first 24–48 hours precisely because that's when you feel the least injured. A pain rating of '2 out of 10' at hour 12 becomes embedded in your claim file and is used to dispute the 8 out of 10 you report at week two.
Decline any recorded statement until you've completed your initial medical evaluation.
- 3
Mistake #3: Assuming 'mild' symptoms don't warrant a doctor visit.
Whiplash, concussions, and disc herniation routinely feel minor initially and become disabling. A headache worsening over five days can indicate a subdural hematoma. Abdominal soreness after a crash may indicate internal organ injury — a medical emergency.
If something feels wrong after an accident, see a doctor the same day. Same-day urgent care in LA costs $100–$300. The cost of a missed diagnosis can be your entire claim and your health.
- 4
Mistake #4: Not keeping a symptom diary.
Medical records only capture what you report at appointments. A daily written log of pain levels, sleep disruption, and daily-life impacts is powerful evidence — especially for non-economic damages like pain and suffering, which have no receipt.
Start a notes entry on your phone the day of the accident and update it every day.
Why Work With a CaseCompass Attorney
No upfront cost. No obligation. Just answers.
Your Consultation Is Always Free
Every attorney on CaseCompass works on contingency — you pay nothing upfront, and nothing at all unless your attorney wins or settles your case.
Government-Sourced, Attorney-Verified
Every guide is built from official state records, federal statutes, and government data — then reviewed by a licensed California attorney with a verified clean disciplinary record.
Re-Verified Every 90 Days
Content is reviewed on a 90-day cycle with the reviewing attorney's name and Bar number listed transparently on every page.
24/7 Intake — English & Spanish
Every CaseCompass partner firm provides round-the-clock intake in both English and Spanish so you can get answers the moment you need them.
Your Privacy Is Protected
We never share your personal information without your explicit consent — your eligibility check is free, confidential, and carries zero obligation.
Frequently Asked Questions
I felt fine after the accident but have neck pain 3 days later. Is my claim still valid?▼
Yes. Delayed-onset injuries are medically recognized and legally protected in California. See a doctor immediately and tell them your symptoms began after the accident. A 72-hour gap weakens your claim but does not eliminate it — get care now and document the connection clearly.
What are the most common delayed injury symptoms after a car accident?▼
Whiplash (neck stiffness, headaches), back pain, shoulder pain, numbness or tingling in extremities, dizziness, cognitive fog, sleep disturbances, and abdominal pain. Abdominal pain after a crash requires emergency evaluation — it may indicate internal injury.
How long after a crash can injuries appear?▼
Soft tissue injuries usually manifest within 24–72 hours. Spinal disc herniations may take one to two weeks to produce symptoms. Mild TBI (concussion) symptoms can develop gradually over days. PTSD and psychological effects often emerge over weeks to months.
Does going to the doctor late hurt my case?▼
Yes, it can. California insurance adjusters systematically use treatment gaps to argue injuries are pre-existing or unrelated to the accident. Even if you feel okay, a same-day or next-day urgent care visit creates the causation record that protects the value of your claim.
Can I still file a claim if I didn't go to the ER the day of the accident?▼
Yes. California's 2-year statute of limitations under CCP § 335.1 gives you time. But delays in treatment directly reduce claim value. See a doctor as soon as symptoms appear, document the connection to the accident explicitly, and consult a personal injury attorney.
What symptoms should send me to the ER immediately?▼
Seek emergency care for: severe or worsening headache, confusion or memory loss, abdominal pain or bruising across your midsection, numbness in arms or legs, vision changes, difficulty speaking, vomiting, or any loss of consciousness — even briefly — after an accident.
Sources & Citations
Related LA Accident Guides
Deep-dive service guides written with our verified partner attorneys.
Check My Case Value & Protect My Claim →
Free · No obligation · 24/7 intake open
⚡ Free · No Obligation
See If You Qualify in 60 Seconds
Step 1 — Select accident type
What type of accident were you in?