Q. My free thyroxine levels got slightly raised after COVID-19 infection. Is it normal?

Answered by
Dr. Shaikh Sadaf
and medically reviewed by Dr. Hemalatha
This is a premium question & answer published on Dec 14, 2020 and last reviewed on: Jun 07, 2021

I had positive corona around 5 & half weeks ago and suffered symptoms of severe fatigue & high palpitations after checking my heart lungs etc bloods all is fine the only thing they have seen on my bloods is my free thyroxine levels are slightly raised I.e. 25 it was checked twice 2 weeks ago was also 25 and still have ongoing fatigue and occasional sudden heart palpitations. My GP wants to refer me to endocrinologist. I’m 29 years old no previous medical problems. I have blood test from year ago and at the time my thyroid level was fine. Im Male 29y 165cm 61KG I attached 2 reports 1) blood test results 2) my heart palpitations recoded on my Kardia app with Alivcor



I just read your query and the reports that you have attached. Yes the free thyroxine levels are slightly high but the normal TSH levels are reassuring and suggest that the viral infection was the likely reason behind it. It would definitely be worth repeating it again in 6 weeks time. However the tachycardia or the increased heart rate seem to be a cause for concern. It has been observed in some young male patients the cause for this to be the virus induced inflammation of the blood vessels of the body that could be one of the possible cause. It would be better if you were also referred to a cardiologist for further assessment. Hope you feel better soon.

Hi doctor,

Would it have shown the inflammation of blood vessels in the blood tests? How dangerous could it be?



Welcome back to

Well it is not showing up on the tests. You need more advanced cardiovascular opinion to be able to comment on that.

Thank you.

Was this answer helpful?


Same symptoms doesn’t mean you have the same problem. Consult a doctor now!

Related Questions:
Will improper sexual intercourse make it difficult to get pregnant?

.. have been on Thyroxine and your TSH levels are normal and your remaining hormonal profile is normal with optimal fertility and ovarian reserve as depicted by AMH levels , now you can opt for a dummy cycle where follicular monitoring can be done du...   Read full

Homeschooling - Tips for Parents

.. as a result of school closures due to the COVID-19 pandemic lockdown. Many parents are struggling to come to terms with this new way of teaching their children. This article will discuss some advice and strategies to support parents in teaching th...   Read full

Holiday Season During the Pandemic

The SARS-CoV-2 virus is highly infectious, so no in-person communication is without risk ... Exposure While Traveling to the Location - You can get exposed to the virus while traveling ...   Read full

Also Read Answers From:

ideaComprehensive Medical Second Opinion.Submit your Case

Also Read

Monkeypox Virus - Symptoms, Diagnosis, Treatment, Complications, and Prevention
Monkeypox is a zoonotic viral disease. This virus got its name as it was first noticed in laboratory monkeys in the late...  Read more»
Tomato Fever - Causes, Symptoms, Diagnosis, Treatment, and Prevention
Tomato fever is an unidentified and fast-spreading type of viral infection seen in young children. Scroll down to know m...  Read more»
Histrionic Personality Disorder - Causes, Signs, Symptoms, Diagnosis and Treatment
Histrionic personality disorder causes variations in the thinking ability of a person. Read this article to know more.  Read more»

Ask your health query to a doctor online?

Ask an Endocrinologist Now

* guaranteed answer within 4 hours.

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.