Magnetic Resonance Imaging (MRI) is a valuable diagnostic tool. While generally safe, some individuals may experience feelings of sickness or discomfort during or after the procedure. This article explores common sensations, reasons for feeling unwell, and tips for managing discomfort.
Common Sensations During an MRI
Most individuals undergoing an MRI scan will experience distinct sensations that are typically not cause for concern. The machine generates loud banging, clicking, and humming noises from electrical currents. Patients are usually provided with earplugs or headphones to mitigate these sounds.
The MRI machine is a large, enclosed tunnel, and lying still inside it can create a feeling of confinement. A slight warming sensation on the skin is also common, a normal effect of the magnetic fields and radio waves. These sensations are expected and do not indicate a problem with the scan or your health.
Reasons for Feeling Unwell During or After an MRI
Individuals may experience feelings of unwellness during or after an MRI due to physical and psychological factors. These sensations, while unsettling, are usually temporary.
Claustrophobia and Anxiety
The MRI machine’s enclosed nature and loud noises can trigger anxiety or panic attacks. This anxiety can manifest physically with symptoms such as nausea or dizziness. Claustrophobia, a fear of confined spaces, is a common reason for distress during an MRI.
Contrast Agent Reactions
Some MRI scans involve a gadolinium-based contrast agent (GBCA) to enhance image clarity. While severe reactions are rare, mild ones can occur. These might include temporary nausea, headache, dizziness, or a cold sensation at the injection site. Most mild reactions usually resolve within minutes or hours.
Motion Sickness/Vertigo
The strong magnetic fields and rapidly changing gradients within the MRI machine can occasionally disorient the inner ear in susceptible individuals. This disorientation can lead to sensations similar to motion sickness or vertigo, causing nausea or dizziness.
Discomfort from Lying Still
Remaining still for an MRI scan, which can range from 20 to 90 minutes, can lead to physical discomfort. Prolonged stillness might result in muscle aches or lightheadedness when standing up. The stress of the procedure and concern about a medical condition can also contribute to post-scan fatigue or headaches.
Managing Discomfort and Preparing for Your Scan
Several strategies can help manage discomfort and prepare for an MRI scan, potentially reducing feelings of unwellness. Planning ahead and communicating with medical staff are important steps.
Inform the MRI technologist about any history of anxiety, claustrophobia, or previous unwell experiences. This allows staff to provide additional support and enhance your comfort. They can offer earplugs or headphones to reduce noise, and some facilities allow you to listen to music.
Practicing relaxation techniques before and during the scan can be beneficial. Deep breathing exercises, meditation, or guided imagery can help manage anxiety and promote a calmer state. Keeping your eyes closed or using an eye mask may also help reduce feelings of confinement.
For significant anxiety or claustrophobia, a doctor might prescribe a mild sedative. If you take a sedative, arrange for someone to drive you home. Unless instructed otherwise for specific scans, you may generally eat and drink normally. However, some facilities recommend avoiding heavy or fatty foods, carbonated, or caffeinated beverages before the scan. Open MRI machines, with a less enclosed design, are an alternative for those who cannot tolerate traditional scanners, though they may not be suitable for all imaging types.
When to Seek Medical Advice
Most discomfort experienced during or after an MRI is mild and temporary. However, it is important to know when to seek medical advice. Contact a healthcare professional if you experience severe or persistent symptoms.
Symptoms that warrant medical attention include extreme nausea, vomiting, widespread hives or rash, difficulty breathing, or any unusual or worsening symptoms that do not resolve with rest. These could indicate a more significant reaction, especially if a contrast agent was used. Although rare, severe reactions require prompt medical evaluation.