Low-Grade Fever in Women: When to Seek Medical Advice

The issue of fever and low-grade fever?

Hello Doctor, I started feeling feverish on Monday evening, with my temperature rising to a maximum of 37.6°C.
The fever continued the next day.
On the afternoon of the third day, my temperature peaked at 37.8°C, accompanied by a headache and slight diarrhea.
I felt uncomfortable, similar to having a cold (but without respiratory symptoms), and I experienced low mood and increased emotional sensitivity.
My average temperature was around 37.5°C, and I felt like lying down.
On the fourth day, I still had a fever in the afternoon, reaching a maximum of 37.6°C, but it gradually improved by the evening.
This morning, on the fifth day, my temperature returned to my usual range of over 36°C, and I no longer have a fever.
I feel much better now and also noticed that my menstrual period started.

P.S.
I have been in home isolation this week, and I tested negative for PCR last night.
I also had blood and urine tests done, and the doctor said my white blood cell count and other results were normal.

I would like to ask the doctor: 1.
Since I occasionally experience fever sensations, which usually last for two days after my period, could this week's fever be related to my menstrual cycle? 2.
Do I need to go to the hospital for further examination regarding this low-grade fever? Thank you!

Athy, 30~39 year old female. Ask Date: 2022/04/22

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, it should not be related to menstruation.
If you still feel unwell, you can wait until the restrictions are lifted to see a doctor.
Wishing you good health.

Reply Date: 2022/04/22

More Info

Low-grade fever, 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, especially women. Your experience of fluctuating temperatures, accompanied by mild symptoms such as headaches and gastrointestinal discomfort, raises several important considerations regarding the potential causes and when to seek further medical advice.

Firstly, it is essential to recognize that low-grade fever can be influenced by various factors, including hormonal changes, infections, and even stress. In women, menstrual cycles can significantly impact body temperature due to hormonal fluctuations. The luteal phase of the menstrual cycle, which occurs after ovulation and before menstruation, is characterized by increased progesterone levels, which can raise the body's baseline temperature. This could explain why you experienced a low-grade fever coinciding with the onset of your menstrual period.
Additionally, emotional factors such as stress or anxiety can also manifest physically, leading to symptoms like fatigue, mood changes, and even mild fever. The emotional toll of feeling unwell can exacerbate these symptoms, creating a cycle of discomfort.
Regarding your specific questions:
1. Could the fever be related to your menstrual cycle? Yes, it is quite plausible that your low-grade fever is linked to your menstrual cycle. Many women experience changes in body temperature during their cycle, particularly around ovulation and menstruation. The timing of your symptoms suggests a potential correlation. However, if you notice persistent or unusual symptoms, it is always wise to consult a healthcare provider.

2. Should you seek further medical evaluation for this low-grade fever? Given that your blood tests returned normal results, including white blood cell counts, and that you tested negative for COVID-19, it may not be immediately necessary to seek further medical evaluation unless your symptoms worsen or new symptoms develop. However, if you continue to experience recurrent low-grade fevers, significant fatigue, or other concerning symptoms, it would be prudent to follow up with your healthcare provider. They may consider additional evaluations, such as imaging studies or referrals to specialists, depending on your clinical presentation.

In summary, while low-grade fever can be benign and related to normal physiological changes, it is essential to monitor your symptoms closely. Keep track of any patterns, such as the timing of your fever in relation to your menstrual cycle, and note any accompanying symptoms. If you experience significant changes in your health, do not hesitate to seek medical advice. Your well-being is paramount, and healthcare providers are there to help you navigate these concerns.

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