Tonsil Swelling and Persistent Low-Grade Fever - Otolaryngology

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Tonsillar enlargement and temperature issues?


In early March, I experienced a throat ulcer and swelling of the left tonsil, suspected to be due to a weakened immune system.
Although the pain has subsided, the tonsil remains swollen.
Since then, my body temperature has consistently ranged from 36.8 to 37.5 degrees Celsius, whereas my normal temperature used to be around 35 degrees.
Although I currently feel fine, I would like to know if this could be due to lingering bacterial infection causing inflammation.
Given the recent sensitivity around elevated temperatures due to the pandemic, should I seek medical attention again?

Chen, 10~19 year old female. Ask Date: 2020/03/23

Dr. Zheng Jueyi reply Otolaryngology


Hello: If there are no obvious symptoms of pain or fever (above 38 degrees Celsius), you can initially self-monitor.
However, if you experience discomfort or if your tonsils continue to enlarge, you should return for a follow-up examination.
Wishing you safety and health.
Sincerely, Dr.
Cheng Jue-Yi, Director of the Department of Otolaryngology, Taoyuan Hospital, Ministry of Health and Welfare.

Reply Date: 2020/03/23

More Info


Tonsil swelling and persistent low-grade fever can be concerning symptoms, especially when they follow an episode of throat pain or infection. Your situation, where you experienced a sore throat with a "hole" and left-sided tonsil enlargement, suggests that you may have had an acute infection, possibly viral or bacterial in nature. The fact that the pain has resolved but the swelling persists, along with a low-grade fever, warrants further investigation.

Firstly, let's discuss the tonsils. The tonsils are part of the immune system and play a role in fighting infections. When they become swollen, it is often due to an infection. In your case, the initial infection may have caused significant inflammation, leading to the swelling that has not yet resolved. The low-grade fever you are experiencing (ranging from 36.8 to 37.5 degrees Celsius) can be a sign that your body is still fighting off an infection or inflammation. It is important to note that a normal body temperature can vary from person to person, and what is considered "normal" for you may be different from the average range.

Persistent swelling of the tonsils can sometimes indicate chronic tonsillitis or other underlying issues. In some cases, if the tonsils remain enlarged for an extended period, they may need to be evaluated further. The fact that you have a history of a lower baseline temperature (around 35 degrees Celsius) is also noteworthy. A change in your normal temperature pattern, especially if it is consistently elevated, could suggest that your body is responding to an ongoing inflammatory process.

Regarding your concern about whether bacteria are still present, it is possible that remnants of the infection could be causing the inflammation. Infections can sometimes lead to complications, such as abscess formation or chronic inflammation, which may require medical intervention. If you have not yet seen a healthcare provider since the initial episode, it would be advisable to schedule an appointment. A healthcare professional can perform a thorough examination, possibly including a throat culture or imaging studies, to determine the cause of the persistent swelling and fever.

In summary, while your symptoms may not currently be causing discomfort, the combination of persistent tonsil swelling and low-grade fever should not be ignored. It is essential to consult with a healthcare provider to rule out any underlying issues and to receive appropriate treatment if necessary. Early intervention can help prevent potential complications and ensure that your immune system is functioning optimally.

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