Developed a fever after having an MRI
Mar 25, 2023
Source: Cainiu Health
Dr. Yang Ziqi
Introduction
Fever after undergoing MRI may be related to stress response, environmental factors, infection, autoimmune reaction, or contrast agent reaction. If experiencing any discomfort, it is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under the guidance of a qualified physician. Consuming foods rich in nutrients such as vitamin C and protein is beneficial; one can eat more fresh vegetables and fruits, such as oranges and broccoli.
Fever after undergoing MRI may be related to stress reactions, environmental factors, infections, autoimmune responses, or contrast agent reactions. If discomfort occurs, it is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under the guidance of a healthcare professional. The specific analysis is as follows:
1. Stress Reaction
Some patients may feel anxious during the examination, especially those with claustrophobia. Anxiety can trigger a physiological stress response, leading to the secretion of hormones such as adrenaline, which may affect metabolism and immune function, potentially causing low-grade fever (typically not exceeding 38°C). Body temperature usually returns to normal once emotional tension subsides.
2. Environmental Factors
The examination room may be cold, and wearing thin hospital gowns can make patients susceptible to catching a chill. Additionally, failure to change clothes promptly after the scan may lead to discomfort due to temperature fluctuations, possibly resulting in fever. Physical cooling methods such as wiping the body with lukewarm water may help. Patients should rest adequately, drink plenty of warm water, and typically recover on their own.
3. Infection
Viral or bacterial infection is a relatively common cause. Exposure to pathogens before the examination, combined with decreased immunity afterward, may lead to infection. For example, infection with rhinovirus can stimulate the body's temperature regulation center through inflammatory processes, causing fever accompanied by symptoms such as coughing. Patients should rest sufficiently, drink plenty of fluids, and ensure good indoor ventilation. Rest helps restore energy and strengthens the body’s ability to fight infection, while adequate hydration can relieve sore throat and promote metabolism. Viral infections generally resolve spontaneously within 1–2 weeks.
4. Autoimmune Response
In patients with autoimmune diseases, factors such as the magnetic field used in MRI may affect the internal environment. For individuals with conditions like rheumatoid arthritis or systemic lupus erythematosus, the examination may trigger an immune response that attacks the body's own tissues, leading to inflammation and fever, often accompanied by symptoms such as joint redness and swelling. Treatment may include medications such as ibuprofen sustained-release capsules, aspirin tablets, or acetaminophen tablets, taken as directed by a physician.
5. Contrast Agent Reaction
Some MRI examinations use contrast agents to enhance image clarity. These agents may cause allergic or adverse reactions, with fever being one possible symptom. For instance, an allergy to gadolinium-based contrast agents may result in fever and rash. Severe reactions may include difficulty breathing, severe rash, or hypotension, requiring immediate anti-allergic treatment. Medications such as epinephrine hydrochloride injection, loratadine tablets, or ketotifen fumarate capsules may be used under medical supervision to alleviate symptoms.
In daily life, maintaining a balanced diet rich in nutrients such as vitamin C and protein is beneficial. Consuming more fresh vegetables and fruits—such as oranges and broccoli—can help strengthen the immune system.
