Hello dear
It is not compulsory that person you have hypothyroidism will gain weight .I have many patients who lose suddenly because hypothyroidism. If you want to discuss in details ,about this ,consult us thru the link below
Next Steps
For more information,or to contact me directly,phone or for online counselling contact-https://www.facebook.com/doctorplanmydiet/
Thanks with Regards
Dt.Ankita