Persistent Low-Grade Fever: Causes and Concerns - Family Medicine

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Persistent low-grade fever can be a perplexing symptom, especially when it is accompanied by other vague symptoms such as mild diarrhea, muscle aches, and general malaise. Your experience of having a temperature ranging from 37.5 to 38 degrees Celsius for an extended period, without any significant discomfort, raises several considerations regarding potential underlying causes.

Firstly, it is essential to understand that a low-grade fever is generally defined as a body temperature that is elevated above the normal range but not high enough to be classified as a fever in the traditional sense (which is typically considered to be 38 degrees Celsius or higher). Low-grade fevers can be caused by a variety of factors, including infections, inflammatory conditions, and even stress or fatigue.

Given your recent history of exposure to colleagues who traveled to Thailand, it is prudent to consider the possibility of an infectious process. While your colleagues tested negative for COVID-19, there are numerous other viral and bacterial infections that could lead to persistent low-grade fever. For instance, gastrointestinal infections, which could explain your mild diarrhea, can sometimes present with low-grade fever and muscle aches. Additionally, conditions such as viral syndromes, including those caused by enteroviruses or other pathogens, may not always present with high fevers but can still cause significant discomfort and systemic symptoms.

Another important factor to consider is the impact of stress and fatigue on your immune system. Working in a service-oriented job, especially in a bustling environment like public transportation, can lead to increased exposure to pathogens. Coupled with the physical and mental stress of your work, this could contribute to your symptoms. Stress can lead to a dysregulated immune response, which may manifest as persistent low-grade fever and other nonspecific symptoms.

In your case, the presence of chills, headache, nausea, and throat discomfort suggests that there may be an underlying process that needs further evaluation. While it is understandable to be cautious about frequent visits to healthcare facilities, it is crucial to monitor your symptoms closely. If your fever persists or worsens, or if you develop additional symptoms such as significant fatigue, respiratory distress, or gastrointestinal issues, it would be advisable to seek medical attention.

In terms of management, maintaining good hydration, getting adequate rest, and managing stress through relaxation techniques or light exercise can be beneficial. Additionally, keeping track of your symptoms and any changes in your condition will provide valuable information for healthcare providers should you need to seek further evaluation.

If your symptoms do not improve or if you have concerns about potential infections, it may be worthwhile to discuss with your healthcare provider the possibility of further testing, including blood tests or imaging studies, to rule out any underlying conditions. It is also essential to communicate openly with your family about your health concerns, as their support can be crucial during this time.

In summary, persistent low-grade fever can have various causes, and while it may be related to stress or minor infections, it is essential to remain vigilant and seek medical advice if your symptoms persist or worsen. Your health is paramount, and addressing these symptoms early can lead to better outcomes.