In fact, a swollen neck may indicate thyroid problems. The thyroid gland, which is found in the front of the neck, creates hormones that control a number of physiological processes. A thyroid disorder may cause the thyroid gland to grow, which can give rise to a bloated or enlarged neck. The two primary thyroid disorders that are linked to neck edema are: The abnormal swelling of the thyroid gland is referred to as a goitre. It can happen for a number of causes, such as an iodine deficit or inflammation. Nodules or abnormal growths in the thyroid gland are known as thyroid nodules. Even though the majority of nodules are benign (non-cancerous), they might enlarge the gland and lead to a swollen neck.