Hi I have a question regarding a underactive thyroid. I got blood work done last november, and went back to see my doctor in march. I had to ask him how my results were and thats when he told me my thyroid was underactive. My father also has a underactive thyroid and takes a pill every day. Now when the doctor told me about the underactive thyroid he gave me another blood test and I still havent heard back from him. Do I need medication like my father takes everyday for this? I always feel tired. bad memory and I dont know what I should do, If I should see another doctor about this, or if I need medication. Im a 22 year old male, also my father was diagnosed with hypothyroid when he was 28. Thanks alot!!! really appreciated.