Jeg leste akkurat i Thyroid Sourcebook (Rosenthal, 2009) at:

"If you have normal TSH levels but still have symptoms of hypothyroidism, then you should be relieved to know that the persistent symptoms are not likely to be related to your hypothyroidism and you can investigate other causes and remedies. The goal of treating hypothyroidism is to restore your thyroid levels to normal. The hypothyroid state in your body may exist along with other problems (see Chapter 7). Ask anyone who is not hypothyroid if they’re tired, depressed, constipated, or achy, and a huge majority will say yes to at least one of those complaints in spite of normal thyroid levels and no history of thyroid disease.

There are numerous false and bizarre theories about why hidden hypothyroidism persists in spite of normal TSH levels. It’s important to understand that it’s not really hidden hypothyroidism, but hidden causes for your symptoms that can mimic (or, in most cases, mask) hypothyroidism. In other words, you can continue to feel “hypothyroid” when you’re not because the symptoms of hypothyroidism overlap with other causes not related to thyroid problems. These include physical and emotional stress; sleep deprivation; normal aging, including menopause; sedentary living; poor diet; obesity or obesity-related diseases, such as diabetes or cardiovascular disease; and many others.

Remember, too, that bouts of hypothyroidism seriously interfere with your normal activities. Many people become more sedentary, gain weight, and consequently feel bad even after their thyroid hormone levels are restored. Bouts of hypothyroidism can leave you out of the loop at work and in your social life, and you may feel the consequences of catching up or the long absence of engagement in your community or your social network; in turn, that can trigger real depression.

It’s important to understand that you can’t blame all your symptoms of poor health on your thyroid condition, especially when you have cofactors for other diseases. This includes poor social support systems at home, which can predispose people to depression. In short, there are things going on in your life and body other than hypothyroidism; indeed, many people have multiple health conditions simultaneously.

(...)

The most common complaints among posttreatment thyroid patients
are weight gain, bloating and constipation, and fatigue. If your TSH
level is normal and you are euthyroid, the most common reason for
these symptoms is lack of exercise. In fact, one of the most overlooked
complementary activities for thyroid disease is exercise."

Eller, sammendrag: Føler du deg sjuk med normal TSH bare tuller du.