Although it can not be completely cured but it can be prevented. Theroid disease often have two types; hypothyroidism which is the under production of the thyroid hormone called thyroid, while the over production of it is known as hyperthyroidism. And basically these conditions are caused by inadequate consumption of iodine.
Some of the symptoms of the lack of tthyroxine could range from stunted grown, gigatism, tiredness, depression, anxiety, just to name a few, depending of its type and the gender.
However, it has scientifically be proven that thyroid diseases can be prevented by increasing the intake of food substances that are rich in iodine. Iodine is a natural occuring substances that are used in the formulation of foods. And lack of this iodine causes thyroid diseases.