Could you tell me what happens if my thyroid gland has being removed?

Need levothyroxine: You need to replace thyroid hormone with levothyroxine. The dose varies, but it is relatively easy to adjust and it should not affect your other life functions.

Hormone replacement?: If only half is removed then 80% will be ok and produce enough hormone from the half that is left. About 20% will need supplementation. If the whole gland is removed, then you will need supplementation. I agree that most are easy to supplement, but others need several dosage changes to get the amount right. Be patient, it can be helped.

You need to: Begin brand name T4 replacement, and have your doctor check your levels every six weeks until they are normal, and then once / year. You will be on this medication for the rest of your life. Don't believe internet scams about the thyroid. Trust your doctor.