Yep it goes away. Other symptoms to look for would be weight gain (especially in the abdomen with possible thinning of the arms and legs), a rounding of the face, a thinning of the skin and easy bruising, diabetes, high blood pressure, acne, excess hair growth.
I actually don't have many symptoms, just acne really. I have a pit tumor. Which in 99% of cases aren't cancerous by the way. And this might be a bit of a stretch but pit tumors can raise and lower your tsh level, so there is a chance there could be a connection.
I hope I'm wrong and you and your mom are perfectly healthy