Thyroid Imbalance

My sister in-law had Thyroid imbalance that causes her to gained weight. She often gets sick and it weakens her body. She is currently taking some medication for her health problem but it seems like it does not help at all. She still weights the same, her body is weak all the time and depress. She is planning to see a specialist before the end of this month and I hope that when the time comes that she has to see the doctor, she can get positive results. I feel sorry for her because she is not use the way she looks now, it affects her self-esteem. Whenever there is a party, she decides to stay at home and not socialize people because she is uncomfortable with her body. I keep telling her that she looks fine and that outside appearance is not that important.