Hey you two: I hope you'll both get better. Thyroid problems can be a real pain and are such a chameleon in the sense that hypothyroidism can cause such a wide array of problems. Fortunately, with the advent of laboratory testing, this condition is routinely diagnosed and can usually be treated very well with L-Thyroxin supplementation.
@Dark Walker: To answer your question - yes, it is possible and highly likely that you'll fully recover once your dosage of L-Thyroxin is sufficient. Physiologically, a hormone from the brain (called "TSH" or
thyroid stimulating hormone is secreted that tells your thyroid gland (located in front of your voice box) to produce its hormones (T3 and T4). Your thyroid gland is obviously not producing enough of these hormones, which in turn causes your brain to secrete more of that TSH (because the brain thinks that by shouting at the thyroid gland, things will improve).
Because it's difficult to see exactly how every body responds to 25µg of your supplemented L-Thyroxin (which is T3), your doctor will check the TSH-levels in the blood and may increase the dose if the level remains high. This is just something that needs to be figured out over the next couple of weeks and you might have to be patient for your symptoms to fully improve.
As for the ailments you mentioned: exhaustion, brittle hair, and memory loss are all very typical symptoms of hypothyroidism - so, chances are that you're going to feel better in this regard, once you're adequately supplemented.
As for why hypothyroidism is dangerous: well, for a multitude of reasons. Two of these reasons are "serious business" - one being the increased risk of
coronary heart disease. This is risky because it will cause a lot of problems later on in life: basically what happens is that cholesterol deposits in your arteries, clogging them up and causing a shortage of blood in the tissue. This is what is known as a heart attack, stroke or peripheral arterial disease (all are manifestations of the same basic problem). Coronary heart disease is a very, very common problem that causes about 15% of all deaths - as such, reducing a risk factor means you're investing in a healthy future.
The other, more acute killer is the risk of
myxedema coma. This is a rare complication, but should be mentioned. Basically, what happens is this: you already have a low thyroid function - imagine what would happen if that last reserve of thyroid function is completely lost! Stress, surgery, trauma - anything could trigger your thyroid gland to momentarily stop producing enough thyroid hormones to keep your body going. The result is that your heart beats too slowly for your body to be supplied with enough oxygen, meaning that you slip into a coma.... sounds very dramatic and is extremely rare, and usually only found in patients that have a severe case of hypothyroidism and then also additionally had an infection.
Again, this all sounds dramatic and you shouldn't worry about it. Nonetheless, it goes to show that taking your thyroid medication is a hassle-free way to boost your physical and mental health.
I hope that this somewhat helps to clear up any questions you have. I tried to keep it as simple as possible - if you have further questions, please feel free to have a go. If there's a specific article that you're having trouble understanding, you can post that aswell and I'll see if I can have a look.
Either way, I hope you feel better soon!
By the way, 25µg is on the lower end of the dosage spectrum - so chances are good that the extent of your hypothyroidism is limited.
@Girly123 While I admire your faith, I do believe that it is useful to take your medicine as it is perscribed by your doctor. :/ But then again, it is your body and your decision and your responsibility.