From what I have researched...a thyroid cannot grow back.
Thyroid TISSUE can and so too can cancer in the thyroid tissue.
The only way that a thyroid can function again is if you suffer from Graves, Had RAI (no Thyroidectomy) and the thyroid can 'fire up' later on in life because it wasn't fully nuked.
If you are skipping doses of meds and taking basically whatever you can lay your hands on to make the prescription go further, you are at high risk of Myexedema Coma where the thyroid levels are too low, the TSH too high.
THEN the bodys organs start to malfunction.
This can be a slow process or a fast one...depending on each individual person.
This is a dangerous practice and I wouldnt advise anyone to do it.
A T4 med is not expensive by any means and should be treated like 'food' as that is what it is to your body.
if you starve yourself of food when its needed , eventually you will die.
The same goes for T4 meds if your organs need it and you fail to get it.
Dont you feel sick or tired?
You dont say if you had RAI or not after your throid was removed???
If you dont take the right amount of meds and dont take them regulary when needed then you are playing Russian Roulette with your own life.
And medical treatment will cost a lot more than a prescription of a T4 med eventually.
You posted a posting to Dr. Lupo in August 2008 and he gave you his response telling you that you need a T4 med for the rest of your life.
http://www.medhelp.org/posts/Thyroid/How-can-I-make-my-thyroid-grow-back/show/606653?personal_page_id=96679&post_id=post_3336531
I would be going back to your Doctor as there are places where you can get help as RedHead said but to ignore the situation hoping for a miracle....that is never going to happen.
Sorry to be blunt but there are people here who want to be helped and are going through debilitating symptoms and this posting is just giving them false hope.
I am sorry but I disagree with you.