In our daily life, we occasionally find nodular swellings in the neck, which can be located in any part of the neck, and some of them can be accompanied by pain. Many people would think that this is probably inflammation, but in fact, this idea is wrong and even very dangerous, and sometimes it can cause delay and lose the best time for treatment. Neck swellings can originate from different tissues and organs, and the characteristics of swellings from different sources vary. Swellings in the anterior part of the neck are mostly thyroid tumors; swellings in front of the ear, under the ear and under the jaw and chin are mostly from salivary glands; swellings on both sides of the neck can be metastatic cancer of the lymph nodes in the neck, lymphadenitis, lymph node tuberculosis; or nerve sheath tumors, gill slit cysts, hemangiomas, etc. Here are some basic features of thyroid tumors as an example. The incidence of thyroid tumor is increasing year by year, and the latest report shows that 1 out of 5 people in China has thyroid nodules. The prevalence of thyroid cancer among thyroid nodules is 5-15%. The prevalence of thyroid cancer among thyroid nodules is 5-15%. The age of onset is mostly during the active thyroid function period, mostly between 20-50 years old, and the onset decreases later. Thyroid tumors may be associated with genetic factors, autoimmune diseases, radiation exposure, and exposure to iodine in the environment. Thyroid tumors may present as single or multiple nodules, round or oval, either cystic or solid, with a smooth surface. Thyroid tumor is a pre-cervical swelling, mostly found by chance, and usually grows slowly. If the thyroid tumor is large, it will compress and displace the trachea, causing poor breathing or difficulty in breathing. If the thyroid tumor suddenly increases significantly with or without hoarseness, this may be a sign of tumor malignancy. The diagnosis of thyroid swelling is made with the help of physical examination, ultrasound diagnosis, and may require ultrasonography and fine needle aspiration if necessary. If a thyroid swelling is considered benign, periodic review can be considered. If pressure symptoms appear, early surgery is recommended. If malignant is considered, most of them should be operated actively to avoid delaying treatment to cause metastasis of malignant tumor and compression of important surrounding tissues and organs such as trachea, esophagus and blood vessels to affect the treatment effect. Most of the tumors need surgery and most of them have good treatment effect compared with other parts of the body. Therefore, neck tumors should not be taken lightly and timely consultation can give most patients a better prognosis.