Is TSH Level Of 6.4 MIU/L A Cause For Concern?

Posted on Thu, 20 Apr 2017

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Thu, 20 Apr 2017 Answered on

Thu, 11 May 2017 Last reviewed on

Question : A recent blood test shows that my TSH level is 6.4 mIU/L. What could be the cause of this? I hav always had normal levels until this last test. I suffered from fatigue a few months ago, but that seems to be better now. I am over 65.

Answered by Dr. Mirjeta Guni (6 hours later)

Brief Answer:
Hashimoto disease should be confirmed;

Detailed Answer:
Hello,
I have gone through your concern.
The most common cause of hypothyroidism (high TSH elevel) is Hashimoto thyroiditis, an autoimmune disease that is confirmed by checking the antibodies (Anti-TPO and antiTG).
To judge rather it needs treatment or not, you need to check the FT4 and Ft3 level.
If they are within the normal ranges, the treatment with levothyroxine should be started if you have symptoms of hypothyroidism ( fatigue, feeling sleepy, dry skin ect).
Otherwise check the TSH once a year, if it reaches levels over 10 mUi/ ml treatment should be started.
Hope the information will help.
Kind regards,
Dr.Mirjeta

Above answer was peer-reviewed by : Dr. Kampana