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Back Pain After a Car Accident: Types, Causes, and What to Expect

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A Pain That Can Take Days to Show Up

Back pain is among the most frequently reported yet often underestimated complaints following a car accident. Even if the collision seems minor and the individual initially feels only mild stiffness, significant pain may develop two or three days later.

This delayed onset is well documented in clinical literature. The body’s stress response, which releases adrenaline and cortisol after trauma, can suppress pain for hours or days. Once these hormones subside, inflammation develops, and previously unnoticed injuries become apparent.

A systematic review published in PubMed found a consistent positive association between motor vehicle collision-related injury and the risk of future low back pain. For patients with chronic low back pain who were initially injured in a collision, the condition was caused by that collision more than 63% of the time. 

The Anatomy of the Risk

To understand why car accidents often cause back injuries, we must first consider the mechanism of injury by examining how the back responds during a collision.

The spine consists of bones, discs, muscles, ligaments, tendons, and nerves. In a crash, rapid acceleration and deceleration forces exceed what the musculoskeletal system can absorb. The spine may flex, extend, or twist beyond its normal range within fractions of a second, before protective reflexes can respond.

Motor vehicle accidents are the main cause of spinal injuries, accounting for 48% of all cases — more than falls, sports injuries, or any other cause. 

Types of Back Injuries After a Car Accident

1
Muscle and Ligament Sprains and Strains
The most common back injuries following a collision are soft-tissue injuries, damage to the muscles, tendons, and ligaments that support the spine. A strain is the stretching or tearing of a muscle or tendon, while a sprain damages ligaments, the tissues that hold joints together. Both cause pain, stiffness, swelling, and muscle spasms that can hinder movement. Low back pain is a prevalent symptom, with approximately 80% of the population sustaining an episode at least once in their lifetime. Within the many causes of low back pain, the most common is intervertebral degeneration, which can be initiated or accelerated by traumatic injury.
2
Herniated Discs
Intervertebral discs, located between each vertebra, have a tough outer ring and a soft, gel-like center that absorbs shock. Collision forces that compress or twist the spine can damage these discs. A herniated disk occurs when the soft, gel-like center of a disk pushes against and leaks out of its outer ring. This puts pressure on the spinal cord and irritates spinal nerves, leading to pain, numbness, and weakness. Pressure from the herniated disc on the longitudinal ligament and irritation from local inflammation result in localized back pain. Lumbar radicular pain arises when disc material exerts pressure on or contacts the lumbar nerve roots, resulting in nerve root ischemia and inflammation. Depending on the herniation’s location, symptoms may radiate into the legs, known clinically as sciatica, or into the arms and hands if the cervical spine is involved.
3
Compression Fractures and Vertebral Fractures
In higher-impact collisions, the vertebrae themselves can fracture. The most common fracture at the thoracolumbar junction is the simple compression or wedge fracture, which accounts for 50% of all spinal fractures. When injuries occur in the upper or middle thoracic spine, it is usually the result of major trauma such as high-velocity motor vehicle accidents. Fractures may not always cause immediate severe pain. In some cases, especially in older adults or those with low bone density, a fracture may first appear as moderate back pain that worsens with movement.
4
Facet Joint Injuries
Facet joints, located at the back of the spine, connect adjacent vertebrae and enable controlled movement. Trauma from a collision can injure these joints, leading to localized pain, stiffness, and limited motion. These injuries are often difficult to detect on standard imaging, highlighting the need for thorough clinical evaluation.
5
Spinal Cord Injuries
At the most severe end of the spectrum, the spinal cord itself can be affected. Physical examination findings in spinal cord injury typically include neurological deficits below the injury level — decreased motor strength, altered sensation, and abnormal reflexes. Effective treatment focuses on acute stabilization to prevent secondary damage and may include surgical intervention to decompress the spinal cord or stabilize fractured vertebrae. Long-term care focuses on rehabilitation to optimize functional recovery, including physical and occupational therapy, as well as assistive devices to enhance mobility and independence.

Why Consistent Follow-Up Matters

A key concern with post-accident back injuries is the risk of undertreatment. Because symptoms are often delayed, variable, or mild at first, individuals may postpone evaluation or stop care before full recovery.

Patients who have experienced low back pain from a motor vehicle collision are at elevated risk for future recurrence of that condition.

Early, thorough, and consistent evaluation by providers experienced in post-accident injuries is the most effective way to understand the full picture of what happened and address it before it becomes a long-term problem.

Imaging plays an important role in this process. X-ray films are the first-line imaging test in low back pain settings, useful for evaluating overall spinal alignment and detecting fractures and degenerative changes. CT imaging allows for the evaluation of calcified structures. MRI is the gold standard for evaluating the relationship of disc material to soft tissue and neural structures.

How AP Healthcare Can Help

Managing back pain after a car accident, especially when symptoms develop gradually and require multiple providers, presents significant care coordination challenges.

AP Healthcare serves as a concierge for post-accident care coordination. We are not a medical provider and do not offer medical advice; those decisions remain between the patient and their healthcare team. We do not determine treatment or provider choices; those decisions are made by the patient and their healthcare team.

We manage the logistics surrounding care. Our team connects injured individuals with experienced providers, assists with scheduling across specialists, arranges transportation when needed, and offers translation services if language is a barrier. We follow up and ensure the recommended care stays on track from the initial evaluation through the entire treatment process.

To learn more, visit aphealthcare.org or call (404) 850-9600.

This article is for informational purposes only and does not constitute medical or legal advice. Please consult a qualified healthcare provider for guidance specific to your situation.

Sources:

  • NCBI / StatPearls — Lumbar Disc Herniation (ncbi.nlm.nih.gov, updated 2023)
  • NCBI / StatPearls — Spinal Cord Injuries (ncbi.nlm.nih.gov, updated 2025)
  • NCBI / StatPearls — Spinal Trauma and Spinal Cord Injury — Diseases of the Brain, Head and Neck, Spine (ncbi.nlm.nih.gov, 2020)
  • PubMed / PMC — Management of Lumbar Disc Herniation: A Systematic Review (pmc.ncbi.nlm.nih.gov, 2023)
  • PubMed — Exposure to a Motor Vehicle Collision and the Risk of Future Back Pain: A Systematic Review and Meta-Analysis — Nolet PS et al., Accident Analysis & Prevention (pubmed.ncbi.nlm.nih.gov, 2020)
  • NCBI Bookshelf — Overview: Slipped Disc — InformedHealth.org (ncbi.nlm.nih.gov)
  • Mayo Clinic — Herniated Disk: Symptoms and Causes (mayoclinic.org, 2025)
  • Cleveland Clinic — Herniated Disk (Bulging Disk): Symptoms & Treatment (my.clevelandclinic.org, 2023)
  • Cleveland Clinic — Back Pain & Spine Therapy (my.clevelandclinic.org)

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