i assume it is...i can speak from a woman's point here/.....I have hypothyroidisum....or Hoshmoto(spelling)...pretty much the gland creates tumors or goiters in the gland and the body wants to kill it...so it works to do so..........symptoms....everyone is different.......weight gain/loss..and not just 2-3 pds,...I mean a noticable difference......sensitivty to hot or cold,with a girl peroid issues, skin issues, hair loss, you name it..mood alternater....
blood test, for tsh,2,3,4....should tell you something......
good luck