1. Must thyroxine hypothyroidism be hypothyroidism? Thyroid hormone is secreted by thyroid gland and has the function of regulating body metabolism. Thyroid hormone abnormalities are most common in thyroid diseases caused by various causes. However, Some non-thyroid diseases also affect thyroid hormone levels, The thyroid function examination shows similar [hypothyroidism] manifestations, such as the decrease of triiodothyronine (T3), or the decrease of T3 and T4 (thyroxine), which are often misdiagnosed as [hypothyroidism]. However, such patients are not really [hypothyroidism]. Instead of relieving the disease after thyroxine supplementation, the disease condition of the primary disease is aggravated. 2. Is what a low T3 syndrome? Low T3 syndrome (low T3 syndrome) refers to the reduction of T3 level caused by other reasons Read More …