Well-meaning academics even introduced spelling absurdities such as the âsâ in the word âisland,â a misguided Renaissance attempt to restore the etymology of the [unrelated] Latin word insula. 1  A discrete, meaningful unit of language which is approved by some authority.
What is an overactive thyroid? Hyperthyroidism happens when the thyroid becomes overactive and produces too much of its hormones. Hyperthyroidism affects women 10 times more often than men, and is most common in people aged 20-40.
The following are symptoms of having an overactive thyroid gland (hyperthyroidism): 1  Being restless, nervous, emotional, irritable, sleeping poorly and being 'always on the go'. 2  Tremor of your hands. 3  Losing weight despite an increased appetite.  The sensation of having a 'thumping heart' (palpitations).