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Is a high TSH level in a newborn a cause for concern?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

My newborn baby was born a week ago, and the TSH was at 18.6. After a week, another test was done, and they said his TSH is still high this time at 16.80. The doctor said we must do another test in six weeks. Should I be worried?

Please help.

Thank you.

Answered by Dr. Ankush Kumar

Education:

MBBS

Professional Bio:

I am Indian Medical Graduate from King George's Medical University, Lucknow,UP. I have done my MBBS, I have 2.5 years of telemedicine experience and served 38000 patients from various specialties.

This doctor is not available for online consultations on the platform anymore.

Hello,

Welcome to icliniq.com.

I can understand your concern.

I got your concern that your baby is having elevated TSH (thyroid-stimulating hormone), which is quite normal for recently born babies. Further monitoring is required; for that, I advise repeating the TSH report after six weeks.

I hope it will get back to normal after six weeks. If not, please report back to me. I will advise according to the reports. The probable causes include transient hyperthyrotropinemia and congenital hypothyroidism. Regarding investigations, you should wait for six weeks and then repeat testing. After that, obtain a thyroid profile for the baby. If the thyroid profile is abnormal, a thyroid scan should be performed.

The differential diagnosis includes permanent congenital hypothyroidism and transient congenital hypothyroidism. The probable diagnosis at this stage is transient congenital hypothyroidism. The current treatment plan is watchful waiting with follow-up testing. No medication is needed at this point. For follow-up, wait for six weeks and then repeat the tests. Return if the results are abnormal, and based on the findings, appropriate medication and further advice will be given.

As a preventive measure, the screening test your baby underwent is the single most important step. Ensuring adequate iodine intake during pregnancy is also essential for proper fetal thyroid development.

I hope this helps.

Kindly follow up if you have more concerns.

Thank you.

Medically reviewed by iCliniq medical review team
Published At February 19, 2026
Reviewed At February 26, 2026

Education:

MBBS

Professional Bio:

I am Indian Medical Graduate from King George's Medical University, Lucknow,UP. I have done my MBBS, I have 2.5 years of telemedicine experience and served 38000 patients from various specialties.

This doctor is not available for online consultations on the platform anymore.

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Education:

MBBS

Professional Bio:

I am Indian Medical Graduate from King George's Medical University, Lucknow,UP. I have done my MBBS, I have 2.5 years of telemedicine experience and served 38000 patients from various specialties.

This doctor is not available for online consultations on the platform anymore.

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