Hyperthyroidism, also referred to as an overactive thyroid is the most common cause of thyrotoxicosis and, occurs when your thyroid gland produces too much thyroid hormone.yperthyroidism, also referred to as an overactive thyroid is the most common cause of thyrotoxicosis and, occurs when your thyroid gland produces too much thyroid hormone.
Instigators and Risk Factors for Eye Phobia. Eye phobia in many (but not all) cases is triggered by a nasty experience in the past. In some cases, it appears the brain has produced the fear with no instigation. You resolve this issue by discovering the source and trading the negative correlations with positive ones.
Many people are afraid of snakes, rats or bats, but these phobias represent the fear of more random animals. 1  Ornithophobia: The fear of birds â especially pigeons â is referred to as ornithophobia, and is actually a fairly common phobia. 2  Lutraphobia: While some people think theyâre cute, others are afraid of otters.