Most people walk away from a car accident believing they are fine. Then, a day or two later, their neck won’t turn when they shoulder check, a headache settles at the base of the skull, or they feel foggy at work. At Core Wellness Centre, this is one of the most common stories we hear at a first visit to our car accident clinic on St. Clair Avenue West.
This guide explains which symptoms are common after a collision, why some take time to appear, which ones need emergency care, and what to do next in Ontario.
Quick answer: The most common symptoms after a car accident are neck pain and stiffness, headaches, back pain, and shoulder or arm pain. Many appear 24 to 72 hours after the crash rather than at the scene.
Get emergency care for a severe or worsening headache, confusion, weakness or numbness spreading into the limbs, chest or abdominal pain, or loss of bladder or bowel control.
Why don’t symptoms show up right away after a car accident?
Many car accident symptoms build over the first 24 to 72 hours rather than appearing at the scene. Stress hormones such as adrenaline can dull pain in the first few hours, and the inflammation in strained muscles and ligaments develops gradually. People are also busy with police reports, insurance calls and getting home, so early warning signs are easy to miss.
A delay does not mean an injury is minor, and it does not mean something is seriously wrong. It is simply how soft tissue injuries tend to behave. We explain why early action matters in our post on the first 72 hours after a car accident.
What are the most common symptoms after a car accident?
Neck pain and stiffness
Neck pain is the most frequently reported symptom after a collision. Research from the Ontario Protocol for Traffic Injury Management (OPTIMa) Collaboration notes that most adults with traffic injuries report neck pain, often with upper limb pain. When it follows the sudden back-and-forth motion of a crash, it is called whiplash.
Our guide to whiplash recovery time covers what to expect and more discussion on whiplash vs concussion found here.
Headaches
Headaches after a crash often start at the base of the skull and spread toward the forehead or behind the eyes. They are commonly linked to irritated neck muscles and joints. However, a headache can also be a sign of concussion, so a new or worsening headache should always be assessed.
Back pain and muscle spasms
The mid and lower back absorb a lot of force during a collision, especially with a lap and shoulder belt. Tight, guarded muscles and spasms are common. Read more about back spasms after a car accident.
Shoulder and arm pain, numbness or tingling
Pain that travels into the shoulder blade or arm, or numbness and tingling in the arms, can mean a nerve is irritated. These symptoms deserve a prompt examination, especially if you notice weakness or dropping things.
Dizziness, blurred vision or ringing in the ears
Dizziness and visual changes can come from the neck, the inner ear, or a concussion. Because the cause changes the treatment, these symptoms need a proper assessment rather than a wait-and-see approach.
Jaw pain
The jaw can be strained when the head moves suddenly. Clicking, aching or difficulty chewing after a crash is worth mentioning at your assessment.
Fatigue, poor sleep and trouble concentrating
Feeling exhausted, irritable or mentally slow is common in the days after a collision. These can also be signs of concussion. Ontario’s Living Concussion Guidelines note that concussion can happen in a motor vehicle crash from sudden acceleration or deceleration forces, even without a direct blow to the head.
Feeling anxious or on edge
Being nervous in a car, replaying the accident, or sleeping poorly is a normal stress response at first. If it lingers, speak with your family doctor. Research reviewed by the Bone and Joint Decade Task Force found that low mood and fear of movement were linked to slower whiplash recovery, so emotional health is part of physical recovery.
Which symptoms after a car accident need emergency care?
Go to the emergency department or call 911 if you notice any of the following:
- A severe headache, or one that keeps getting worse
- Loss of consciousness, confusion, repeated vomiting or unusual drowsiness
- Numbness, tingling or weakness spreading into the arms or legs, or trouble walking
- Loss of bladder or bowel control
- Chest pain or shortness of breath
- Abdominal pain, swelling or bruising across the belly
- Difficulty swallowing or speaking, or double vision
- Severe neck pain that makes any movement feel unsafe
Chiropractic care and physiotherapy come after serious injuries have been ruled out by a physician.
Is stomach or chest pain normal after a car accident?
Some chest and abdominal soreness can come from seatbelt bruising and strained muscles. However, internal injuries can also cause delayed pain. Any stomach pain, chest pain or bruising across the abdomen after a crash should be checked by a physician or emergency department first, not managed at home.
What should I do in the days after a car accident?
- See your family doctor, a walk-in clinic or the emergency department if you have any doubt about your symptoms
- Keep a short daily note of your symptoms, when they started and what makes them better or worse
- Stay gently active within comfort; Ontario-developed guidelines recommend education and movement over prolonged rest or a neck collar
- Notify your auto insurer within 7 days of the accident, and submit your accident benefits application within 30 days of receiving the forms, as Ontario’s accident benefits system has short reporting deadlines
- Book an assessment with a regulated health professional
Our guide to SABS accident benefits in Ontario walks through the claim process step by step.
How does Core Wellness Centre assess car accident injuries?
A first visit with Dr. Kris Dorken, chiropractor, or our physiotherapist starts with the details of your accident and your symptoms. We check your range of motion, strength, reflexes and sensation, and screen carefully for warning signs that need medical follow-up.
In-house X-rays are available when they are clinically indicated, and we refer to a physician when something falls outside our scope.
A situation we see often: someone is rear-ended at a red light, feels fine, and drives home. Two days later they wake up stiff with a headache and decide to wait it out. By week three they are sleeping poorly and avoiding shoulder checks.
Our first job in that situation is to explain what is happening, rule out anything serious, and build a plan that gets them moving with confidence again.
Depending on your assessment, your plan may combine chiropractic care, physiotherapy, registered massage therapy and osteopathy under one roof. Learn more about physiotherapy for whiplash and seeing a chiropractor for whiplash.
Frequently Asked Questions
How long after a car accident can symptoms start?
Most symptoms appear within 24 to 72 hours, but some people notice neck pain, headaches or dizziness several days later. Any new symptom in the weeks after a crash is worth reporting to a health professional.
Should I get checked if I feel fine after a car accident?
Yes, a check-up is a reasonable step even if you feel well. An assessment creates a baseline record of how you were after the accident, which can help both your care and any insurance claim if symptoms appear later.
Do I need a referral to see a chiropractor or physiotherapist after a car accident in Ontario?
No. You can book directly with a chiropractor or physiotherapist in Ontario without a doctor’s referral. Your auto insurer will require specific treatment forms, and our team helps you complete them.
Will auto insurance cover my treatment?
In Ontario, most sprains, strains and whiplash injuries are managed under the Minor Injury Guideline, a pre-approved treatment framework within your accident benefits.
Since July 1, 2026, auto insurance pays first for treatment after a car accident. Coverage depends on your policy and injury, so we review it with you at your first visit. Core Wellness Centre offers direct billing to all auto insurers and helps you with the claim forms.
References
- Côté P, et al. Management of neck pain and associated disorders: a clinical practice guideline from the Ontario Protocol for Traffic Injury Management (OPTIMa) Collaboration. European Spine Journal, 2016.
- Carroll LJ, et al. Course and prognostic factors for neck pain in whiplash-associated disorders: results of the Bone and Joint Decade 2000–2010 Task Force. 2008.
- Living Concussion Guidelines: Guideline for Concussion and Prolonged Symptoms for Adults 18 Years of Age or Older. Supported by the Ontario Ministry of Health.
- Financial Services Regulatory Authority of Ontario. Minor Injury Guideline.
This article is for general education and is not a substitute for an individual assessment. If you have urgent symptoms, contact a physician or go to the nearest emergency department.
