Pain after a car accident: what to know about whiplash

A crash doesn’t have to be dramatic to leave you hurting. According to the National Highway Traffic Safety Administration (NHTSA), about 2.42 million people were injured in U.S. traffic crashes in 2024.^[1]

Source: NHTSA, Overview of Motor Vehicle Traffic Crashes in 2024 (DOT HS 813 791).^[1] According to NHTSA, the 2023–2024 changes in people injured and police-reported crashes were not statistically significant.

One of the most common injuries after a crash, especially a rear-end collision, is whiplash.

What is whiplash?

The U.S. National Library of Medicine (MedlinePlus) defines it as a soft tissue injury to the neck, also called a neck sprain or strain. It happens when the head is suddenly jerked forward and back. MedlinePlus notes that falls and accidents, including car accidents, are a common cause of neck pain.^[2]

Symptoms to watch for

According to the NHS, the most common symptoms are:^[5]

• Neck pain
• Neck stiffness and difficulty moving your head
• Headaches
• Pain and muscle spasms in the shoulders and arms

Symptoms can take several hours to start after the injury.^[5] The NHS advises getting urgent help for severe pain that painkillers don’t ease, tingling or pins and needles, trouble walking or sitting upright, a sudden “electric shock” feeling in the neck and back, or weakness in the hands, arms or legs.^[5]

Neck pain can also come from the shoulder, jaw, head or upper arms, which is why an assessment that pinpoints the source matters.^[2] And if the impact also affected your back, NIAMS recommends seeing a doctor for back pain after a fall or injury, numbness, tingling or leg weakness.^[4]

How long does recovery take?

The NHS says whiplash usually gets better within 2 to 3 months, although some people have symptoms for longer.^[5] The most recent systematic review by the OPTIMa collaboration (Ontario Protocol for Traffic Injury Management), published in 2020, found that:^[3]

• Half of people with whiplash-associated disorders improve substantially within 3 months.
• Half are symptom-free within 6 months.

That also means a significant share of patients still have symptoms beyond that point. The same review found that post-crash psychological factors, such as recovery expectations and coping, are associated with how recovery goes.^[3]

How is it treated?

According to MedlinePlus, treatment for neck injuries depends on the cause and may include ice, pain relievers or physical therapy; surgery is rarely needed.^[2]

For whiplash specifically, the NHS advises keeping up everyday activities even if they hurt a little, because that speeds recovery, and avoiding long periods of resting the neck and using a neck collar, which does not help.^[5] Ideally, a professional should tell you what to do in your case.

In practice, a good plan usually combines:

1. A medical assessment to rule out injuries that need a different kind of care.
2. Guided mobility work and physical therapy to restore range of motion and strength.
3. Pain control tailored to each case.
4. Emotional support when the accident leaves fear, anxiety or sleep problems, since these factors affect recovery.^[3]

Why not wait

• Symptoms can take hours to appear, so feeling fine right after the crash doesn’t rule out an injury.^[5]
• An early medical assessment documents the injuries and how they progress.
• If pain lasts more than a few weeks, get it checked: you don’t have to get used to living with it.

If you were in a car accident and have neck, back or head pain, an assessment can help you understand the injury and start recovery with a clear plan.