Second: iodine deficiency and high iodine cause
Third: congenital defects in thyroid synthesis: the thyroid gland requires the catalytic action of a variety of special enzymes to complete the synthesis process.
Fourth: goiter-causing substances: it has been found that there are foods that may have a relationship with the occurrence of enlargement of the thyroid gland. Eating large quantities of cabbage over a long period of time can cause goiter.
Great Neck Disease is generally more acute, great neck disease in the early stages of no obvious symptoms, only the anterior region of the neck appeared hard and painless lumps, the surface is not flat, the rapid growth of the lumps, the thyroid gland on one side or both sides of the enlargement and hard, accompanied by localized pain, and often to the back of the ear, the top of the head radiation, the whole body can be chills and fever. Most of the thyroid gland is diffusely enlarged, some may be nodular, no pain, generally no systemic symptoms, some have transient hyperthyroidism symptoms, the patient may have some kind of thyroid function lowering symptoms, such as decreased appetite, weakness, mild swelling, and so on.