Low-Grade Fever: When to Seek Medical Attention - Internal Medicine

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Low-grade fever


Hello Doctor, I have had a mild cough since around May 20th.
On May 28th, I suddenly experienced persistent numbness in my tongue, but the symptoms improved the next day.
Starting from May 29th, I measured my temperature with an ear thermometer, which ranged from 37.6 to 38.1 degrees Celsius for three consecutive days.
My appetite is normal, and I have no other significant discomfort.
Given the current severe pandemic situation, I am unsure whether I should go to the hospital for a consultation or testing.
(On May 28th, I learned that a family member of a colleague in the same work area tested positive for PCR, while my colleague tested negative.)

Sherry, 30~39 year old female. Ask Date: 2021/05/30

Dr. Hong Yuanbin reply Internal Medicine


Hello, given the current pandemic situation, it is essential to first rule out the possibility of a COVID-19 infection.
I recommend going to the hospital for a COVID-19 test.
If the result is negative, you may need to visit the infectious disease outpatient clinic to investigate the cause of the fever.
Thank you for your inquiry.

Reply Date: 2021/05/30

More Info


Low-grade fever, typically defined as a body temperature between 99°F (37.2°C) and 100.4°F (38°C), can be a perplexing symptom for many individuals. It often raises questions about its underlying causes and when it is appropriate to seek medical attention. In your case, you have been experiencing a mild cough and a slight fever since late May, along with a transient episode of tongue numbness. Given the current pandemic situation and your exposure to a colleague whose family tested positive for COVID-19, it is understandable that you are concerned about your health.

Firstly, it is important to recognize that low-grade fever can result from a variety of factors. Common causes include viral infections, bacterial infections, inflammatory conditions, and even stress or fatigue. In your situation, the mild cough and low-grade fever could suggest a viral upper respiratory infection, which is quite common and often resolves on its own. However, the fact that you were in contact with someone who had a confirmed case of COVID-19 raises the need for caution.

You mentioned that your appetite remains normal and that you do not have any other significant symptoms, which is a positive sign. However, it is crucial to monitor your symptoms closely. If you develop additional symptoms such as shortness of breath, persistent chest pain, confusion, or bluish lips or face, you should seek medical attention immediately, as these could indicate a more serious condition.

In terms of testing, given your exposure history and current symptoms, it would be prudent to consider getting tested for COVID-19, even if your colleague tested negative. PCR tests are the most reliable for detecting active infections, while rapid antigen tests can provide quicker results but may be less sensitive. If you test positive, follow the local health guidelines regarding isolation and treatment.

Regarding your question about whether to seek medical attention, it is generally advisable to consult a healthcare provider if:
1. Your fever persists for more than three days.

2. You experience worsening symptoms, such as difficulty breathing, severe headache, or persistent vomiting.

3. You have underlying health conditions that could complicate a viral infection, such as asthma, diabetes, or heart disease.

4. You are concerned about your exposure to COVID-19 and want to ensure proper testing and care.

In the context of the ongoing pandemic, many healthcare facilities have adapted to provide safe care for patients with respiratory symptoms. Telehealth options are also available, allowing you to consult with a healthcare provider without the need for an in-person visit, which can help minimize your risk of exposure to other illnesses.

In summary, while low-grade fever can often be benign, your recent exposure to a COVID-19 case and the persistence of your symptoms warrant careful monitoring and possibly testing. Stay vigilant about your health, and do not hesitate to reach out to a healthcare professional for guidance. They can provide personalized advice based on your specific situation and help you determine the best course of action.

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