The main cause of thyroid nodules may be diffuse simple enlargement of the thyroid gland due to iodine deficiency, which can cause bumps on the neck. Patients are advised to have an ultrasound examination of the thyroid gland to clarify the diagnosis, and then a blood test of the five thyroid functions can also help. If it is clear that the bumps are caused by thyroid nodules, timely treatment must be carried out, such as timely supplementation of iodine ions, appropriate food such as seaweed and kelp can effectively replenish iodine ions, when iodine ions are replenished, thyroid nodules may gradually subside. It is also possible that the swollen lymph nodes in the neck are caused by local inflammation, which may lead to swollen lymph nodes. When the infection is controlled, the enlarged lymph nodes will subside on their own.