An MRI is often ordered to help investigate persistent back pain, leg pain, numbness, weakness, or other symptoms involving the spine. But there is a practical problem that does not get discussed very often:
What happens if your back hurts too much to lie still long enough to finish the MRI?
For some people with severe lower back or nerve pain, lying flat on a firm MRI table can significantly worsen symptoms. Others may be able to get into position but find that the pain becomes unbearable after several minutes.
If this happens, it does not mean you have failed the MRI or that there are no other options. The most important step is to inform the ordering physician and imaging facility of what happened so they can determine how to safely obtain the information they need.
Why Can an MRI Be Difficult When You Have Severe Back Pain?
An MRI itself is generally painless. The difficulty is that you usually need to remain in the same position and stay very still while images are being collected. Movement can reduce image quality and may require parts of the scan to be repeated.
That can be challenging if lying flat causes:
- Severe lower back pain
- Pain traveling into the buttock or leg
- Muscle spasms
- Hip or pelvic pain
- Numbness or tingling
- Difficulty straightening the legs
- Increased pain after previous spine surgery
Patients experiencing persistent symptoms can learn more about our back pain treatment in Lafayette and the different structural issues that may contribute to chronic discomfort.
What Should You Do If You Cannot Finish an MRI Because of Pain?
If pain becomes severe during the scan, tell the MRI technologist.
You are not expected to remain silent and endure unbearable pain simply to complete the examination. MRI technologists can communicate with patients during the scan, and MRI systems typically allow the patient to alert the technologist if assistance is needed.
If the examination has to be stopped, the next step is usually to contact the physician who ordered the MRI.
Tell them:
- Which position caused the most pain
- How long you were able to tolerate the scan
- Whether the pain was localized or traveled into a leg
- Whether you experienced numbness, weakness, or muscle spasms
- Whether the imaging center obtained any usable images
- Whether anxiety or claustrophobia also contributed
That information can help the ordering provider and radiology facility decide how to proceed.
Call the Imaging Center Before Trying Again
If your first MRI was stopped because of pain, do not simply book another identical appointment and hope the second attempt goes better.
Contact the imaging center in advance and explain what happened. Ask whether they can make positioning adjustments that are compatible with the required study.
Depending on the body part being examined and the imaging protocol, the technologist may sometimes be able to use approved cushions, padding, or positioning supports to improve comfort. However, positioning also affects image quality. The radiology team needs to determine what adjustments can be made without compromising the examination.
This is why it is better to discuss the issue before arriving rather than waiting until you are already on the MRI table.
Can You Put a Pillow Under Your Knees During a Back MRI?
Sometimes positioning support may help reduce strain on the lower back. For example, some patients find that slightly bending the knees makes lying on their back more comfortable.
Whether a cushion or other support can be used during your particular MRI depends on the examination being performed and the equipment at the imaging center. Ask the MRI facility rather than bringing your own positioning plan. The technologist needs to place you correctly for the images your doctor requested.
Could an Open MRI Help?
Possibly, although open MRI is more commonly discussed for people who have claustrophobia or difficulty fitting comfortably inside a conventional scanner.
Open MRI systems are designed differently from traditional tube-style scanners and may feel less confining. Some modern facilities also have wide-bore MRI scanners, which provide more space while still using a tunnel-style design.
However, an open MRI is not automatically the best option for every spine study. Certain examinations require specific equipment or imaging quality, and open MRI may not be appropriate for every type of scan. If lying flat or positioning is the primary problem rather than claustrophobia, explain that clearly when you call:
“I had to stop my previous MRI because my back pain became too severe while lying on the table. Do you have a scanner or positioning setup that may be easier for me to tolerate?”
That gives the imaging facility much more useful information than simply asking whether it offers an open MRI.
What About Medication Before an MRI?
This requires an important distinction.
Medication may sometimes be prescribed before an MRI for anxiety or claustrophobia, but medication used for anxiety does not necessarily solve severe positional back pain.
Radiology guidance notes that some patients with significant anxiety or claustrophobia may receive a prescribed sedative, and more advanced sedation can be arranged in certain situations with appropriate medical supervision. Patients who receive sedating medication generally need transportation afterward and must follow the facility’s specific preparation instructions.
If pain rather than anxiety prevented you from completing the MRI, tell the physician specifically. Do not take extra pain medication, sedatives, or someone else’s prescription on your own in an attempt to get through the scan.
Can You Have Sedation for an MRI?
In certain circumstances, yes.
Some imaging facilities can perform an MRI with sedation or anesthesia when a patient cannot otherwise tolerate the study. This requires advance planning because sedation involves additional safety monitoring, preparation, transportation arrangements, and medical considerations.
It is not something that can usually be added casually after you arrive for a routine MRI. If your first scan was unsuccessful despite reasonable preparation, ask the ordering provider whether a sedated MRI is necessary and whether the imaging facility can provide it.
What If You Already Took Medication and Still Could Not Complete the MRI?
Tell your physician. This is particularly important because it helps distinguish between different problems.
For example, if you took medication intended to reduce anxiety but still had to stop because severe lower back pain made it impossible to remain still, the issue may not have been claustrophobia at all. Your doctor needs to know that before simply recommending the same approach again.
Explain: “I was not primarily anxious. The pain became too severe to remain still on the table.” That may change the planning for the next attempt.
Could Another Imaging Test Be Used Instead?
Sometimes, but that decision needs to be made by the physician who ordered the test.
MRI is particularly useful for evaluating soft tissues and structures such as spinal discs, nerves, ligaments, and the spinal canal. X-rays and CT scans provide different types of information and are not direct drop-in substitutes for an MRI.
Rather than asking, “Can I just get a CT instead?” a better question is:
“Since I couldn’t tolerate the MRI, is there another way to obtain the information you need?”
The physician can then determine whether another MRI attempt, a different scanner, modified positioning, another imaging modality, or a distinct diagnostic approach makes the most sense.
Why Is Staying Still So Important During an MRI?
MRI images are collected in sequences. During each sequence, remaining still helps the scanner produce clear images. Movement can create artifacts that make the scan more difficult to interpret.
This creates a difficult cycle for someone in severe pain:
$$\text{lying still increases pain} \rightarrow \text{pain causes movement} \rightarrow \text{movement affects images} \rightarrow \text{sequence repeats} \rightarrow \text{longer time on the table}$$
That is another reason severe pain should be discussed beforehand. A plan that allows you to remain reasonably comfortable and still makes it far easier to obtain diagnostic-grade images.
What If Your Pain Shoots Down Your Leg While Lying for the MRI?
Pain that travels from the lower back into the buttock or leg can occur when a spinal nerve is irritated or compressed. Some people also experience burning, tingling, numbness, or weakness.
These symptoms are frequently tied to conditions like a herniated disc or spinal canal narrowing, though an in-person evaluation is critical to narrow down the origin. If lying flat dramatically worsens radiating pain, tell both the physician and MRI technologist.
Patients experiencing persistent burning, shooting, or electric sensations down the lower extremities can explore our dedicated nerve pain treatment in Lafayette to address irritation at the root level.
What If You Have Already Had Back Surgery?
Previous spine surgery can complicate the situation.
Some patients undergo an MRI because pain has persisted or returned following surgery. If lying still triggers severe symptoms, tell the physician about:
- The type of surgery you had and when it was performed
- Whether the current pain is new or longstanding
- Whether symptoms changed after surgery
- Any hardware or implanted devices you have
- Previous postoperative imaging
Patients navigating severe discomfort following an operation can review our guidance on failed back surgery syndrome treatment for insights into post-surgical nerve hypersensitivity and scar tissue formation.
Always tell the MRI facility about implants, stimulators, surgical hardware, or other medical devices before the scan so that proper safety screening can be performed.
Could You Get Pain Treatment Before Completing the MRI?
Possibly, but this is highly individual.
Sometimes imaging is needed before a physician can safely determine which treatment is appropriate. In other cases, the physician may already have enough clinical information or prior imaging to initiate conservative therapy.
You should not assume you must simply endure excruciating pain before anyone can help you. An interventional pain specialist can review your clinical history and assess whether non-invasive care or targeted, non-surgical treatments for chronic back pain can calm acute flare-ups enough to make diagnostic tests tolerable.
You can also explore our range of interventional pain procedures to understand how specialized modalities directly address spinal inflammation.
What Should You Bring If You See a Pain Specialist After an Unsuccessful MRI?
Bring whatever information is already available:
- The MRI order
- Any images that were successfully obtained
- Previous MRI, CT scans, or X-rays with official reports
- Current medication list
- Physical therapy notes or previous injection records
- Surgical records
You should also explain exactly why the MRI was stopped, whether it was localized back pain, muscle spasms, positional instability, or radiating leg pain.
If you are transitioning your care to our clinic for an advanced evaluation, our guide on how to switch pain management doctors outlines how to transfer records smoothly.
When Does Severe Back Pain Need More Urgent Evaluation?
Difficulty completing an MRI because of pain does not by itself mean there is a medical emergency. However, severe back pain should receive immediate emergency medical attention if it is accompanied by:
- New loss of bladder or bowel control
- Numbness in the groin or “saddle” area
- New or rapidly progressing leg weakness
- Recent high-impact trauma
- Unexplained fever paired with severe back pain
- Sudden, severe neurological deficits
Before Your Next MRI, Make a Plan
If you could not finish an MRI because of back pain, the solution is not necessarily to try harder the next time. Instead, figure out why the scan could not be completed (whether it was flat-surface intolerance, sharp nerve pain, muscle spasms, or anxiety) and contact the ordering provider and imaging facility to formulate a modified approach.
Back Pain Evaluation in Lafayette and Opelousas
At Interventional Pain Specialists, we evaluate patients with persistent lower back pain, sciatica, nerve pain, and post-spine surgery pain. Led by Dr. Albert Gros, Jr., our practice provides comprehensive care across Acadiana.
Patients in Lafayette can visit our Lafayette pain clinic, while those farther north can consult our Opelousas pain management clinic. If severe pain has made diagnostic testing or rehabilitation difficult to tolerate, speaking with our pain specialist can help determine the right step forward.
Frequently Asked Questions
What happens if I move during an MRI because of back pain?
Movement can affect MRI image quality and may require the technologist to repeat part of the scan. If you cannot stay still because of pain, tell the technologist instead of trying to hide the problem.
Can I stop an MRI if the pain becomes unbearable?
Yes. You can communicate with the MRI technologist during the examination. If you cannot continue, tell them. You can then discuss the incomplete examination with the ordering physician.
Can an open MRI be used for lower back pain?
Open MRI may be an option for some examinations, but it is not appropriate for every MRI study. Ask the imaging facility or radiologist whether an open or wide-bore scanner can provide the images your physician needs.
Can I be sedated for an MRI?
Sedation is available in some circumstances, particularly when a patient cannot tolerate MRI because of severe anxiety or another problem requiring additional support. It must generally be arranged in advance and requires appropriate medical supervision.
Should I take extra pain medication before my MRI?
Do not change the dose of prescribed medication or take additional sedating medication on your own. If pain prevented a previous MRI, speak with the ordering provider before trying again.
What if I already have an older MRI?
Bring the previous images and report to your physician. Depending on how recent the study is and whether your symptoms have changed, the physician can determine whether another MRI is necessary.
Can a pain management doctor help if I cannot complete my MRI?
A pain management physician can evaluate your symptoms, review existing records and imaging, and determine what additional diagnostic information may be needed. That does not necessarily mean treatment can proceed without imaging, but it can help establish the next appropriate step.
