The swelling in the neck may be caused by the thyroid gland, but in the vast majority of cases it is not, because other places such as a large lipoma in the neck, or a lymphoedema or congenital disease in adolescence can also cause swelling. Oedema in the throat itself can also cause neck swelling. For example, some inflammatory diseases of the thyroid gland are very large, such as Hashimoto’s disease, which can cause large growths. There is also the former iodine deficiency era of the great neck disease can cause neck swelling. Of course, a few tumors of the thyroid gland also cause neck swelling, but this phenomenon is relatively less than the usual neck swelling, so how to judge, really feel the neck swelling, the first thing is to see the thyroid surgeon, head and neck surgeon, if these are ruled out, but also to see the ear, nose and throat doctor, or even the oral surgeon. Therefore, you should seek prompt medical attention from the relevant doctor for neck congestion. There are also cases of neck swelling caused by thyroid disorders, but not most of them. However, there is a special kind of thyroid lump that grows deep in the outer part of the trachea, or even a thyroid tumor that grows in the chest cavity that causes neck swelling, which is more dangerous. Therefore, it can be thyroid disease that causes neck swelling, but not absolutely and not all.