Hi,
I have an under active thyroid diagnosed around 3 years ago. I am on levothyroxine.
My doctor at the same mentioned how there can be different causes such as auto immune hashimotors etc but since treatment is the same I never pursued finding out the cause.
I am however now curious as to whether it is caused by hashimotos. Are there any ways for me myself to find out if I have this? Online blood tests etc?
And if not hashimotos, what other reasons are there for the under active thryoid?