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Low TSH but T3 and T4 normal

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Hi , I just found out that I have a low TSH reading 0.01 my t3 and t4 free tests came back normal... Ihave no symptoms , and was wondering if certain medications or stress levels can affect your TSH level

Category: Endocrinologist

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Category: Diabetologist
 18 Doctors Online


Thank you for asking your query at DoctorSpring.

Low TSH with normal T3 and T4 with no symptoms is likely to be due to Inflammation of thyroid (thyroiditis), or early hyperthyroidism. This can be differentiated by a thyroid scan. Thyroid antibodies test will also help. Alternatively you can repeat the test after a month or two. There is no reason to worry though, as these conditions are not dangerous or cause of concern.

PS : If you are you on thyroxine treatment already for hyperthyroidism, then this pattern of test result can also mean overdose.

Hope this helps
Please feel free to ask followup questions
Thank you

Dr. J Muthukrishnan
Category: Diabetologist
1. 10th Asia-Pacific Pediatric Endocrine Society  Fellows meeting, Seoul, Korea, Oct 2008
2. Eighth ICMR Course on Genetics and Genetic Counseling – Jul 2008 – SGPGI, Lucknow
3. Annual Certificate Course on Endocrinological Laboratory Techniques at National Institute of Nutrition (ICMR) Hyderabad,India, ( Aug-Sep 2006) 
Fellowship: Endocrinology, Diplomate of National Board, National Academy of Medical Sciences, New Delhi, 2008, Medwin Hospital, Hyderabad
Senior Residency: Diplomate of National Board (General Medicine), National Academy of Medical Sciences, New Delhi, 2002
Residency: MD, General Medicine, 1997-2000, Armed Forces Medical College, 2nd position in University
Medical School: MBBS, Armed Forces Medical College, 1992
Dr. J Muthukrishnan and 4 other Medical Specialists are ready to help you

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