Nikhil Prasad Fact checked by:Thailand Medica News Team Mar 03, 2026 1 hour, 29 minutes ago
Can COVID-19 Cause thyroid damage and hormone disorders? Yes, and the damage can linger for months
Medical News: Researchers Warn of Persistent Hormone Disorders After Infection
As the world moves beyond the acute waves of COVID-19, doctors are uncovering a quieter but troubling aftermath. A new systematic review has found that the virus may trigger long-term thyroid disorders that persist for months after recovery, sometimes evolving into chronic autoimmune disease.
The research was conducted by scientists from the Department of Medical Education at Weill Cornell Medicine-Qatar, Doha, Qatar, and the Department of Premedical Education at Weill Cornell Medicine-Qatar, Doha, Qatar. Their findings suggest that COVID-19 is not just a respiratory illness but one that can significantly disrupt the body’s hormone system.
What the Researchers Found
The team analyzed 28 studies from 18 countries, covering 419 patients who developed thyroid problems after COVID-19 infection. These cases included a wide spectrum of disorders affecting how the thyroid produces hormones.
The most frequently reported condition was subacute thyroiditis, an inflammatory disorder of the thyroid that often causes neck pain, fever, and temporary spikes in thyroid hormones. A total of 80 such cases were identified.
Some patients experienced painful inflammation, while others had a painless form that still disrupted hormone balance.
Another 35 patients developed thyrotoxicosis, a condition where excess thyroid hormones circulate in the bloodstream. While many of these cases were temporary, some persisted for months.
More concerning were 147 cases of hypothyroidism, where the thyroid fails to produce enough hormones. Of these, 58 were full clinical cases with clear symptoms such as fatigue, weight gain, and depression. Eighty-six were subclinical, meaning blood tests were abnormal but symptoms were subtle. In some individuals, autoimmune thyroid disease such as Hashimoto’s thyroiditis developed weeks after infection.
In addition, six cases of Graves’ disease, a well-known autoimmune cause of hyperthyroidism, were documented after COVID-19 recovery.
This
Medical News report highlights that in several studies, thyroid hormone abnormalities appeared weeks or even months after the initial infection, suggesting a delayed immune response rather than direct viral damage alone.
Why COVID Affects the Thyroid
Scientists believe multiple mechanisms are involved. The thyroid gland contains ACE2 receptors, which the coronavirus uses to enter cells. This makes thyroid tissue vulnerable to direct viral invasion.
At the same time, severe COVID-19 can trigger an intense inflammatory reaction known as a cytokine storm. This flood of inflammatory chemicals may suppress the brain’s hormone control centers or damage thyroid tissue indirectly.
The virus may also trigger autoimmune reactions through a process called molecular mimicry, where the immune system mistakes thyroid cells for viral particles and attacks them.
Who Is Most at Risk
The review suggests that people who had severe COVID-19, high inflammatory markers, or prolonged symptoms appear
more vulnerable. Women were more frequently affected in several studies, especially in cases of subacute thyroiditis and autoimmune disease.
Encouragingly, many thyroid abnormalities resolved within three to six months. However, a notable portion of patients developed persistent dysfunction requiring long-term monitoring and treatment.
What This Means Going Forward
The researchers recommend routine thyroid testing in COVID-19 survivors, especially those with ongoing fatigue, heart palpitations, mood changes, or unexplained weight fluctuations. Blood tests measuring TSH, free T4, and free T3 can detect early abnormalities before complications arise.
The conclusions are clear and important. COVID-19 can lead to a broad range of thyroid disorders through direct viral effects, immune system overactivation, and autoimmune triggers. While some cases are temporary, others may progress into chronic disease. Early detection and consistent follow-up are essential to prevent long-term health consequences and improve quality of life in survivors.
The study findings were published in the peer reviewed journal: Microorganisms.
https://www.mdpi.com/2076-2607/14/3/543
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Medical News.
Read Also:
https://www.thailandmedical.news/articles/coronavirus
https://www.thailandmedical.news/articles/long-covid 
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