A thyroid cyst is a liquid cyst in the thyroid gland that is round, smooth and soft in texture, and can move up and down with swallowing. thyroid cysts are mostly benign and have no obvious symptoms, so they are not easily detected on a daily basis and need to be determined by actively improving relevant examinations. The risk of thyroid cysts can be aggravated by bad habits, emotional abnormalities and lack of iodine in the body. 1. Bad habits: if patients have long-term smoking, alcoholism, staying up late, or poor eating habits, long-term overeating or eating too much greasy, spicy and irritating food such as fried food, hot pot, barbecue, fatty meat, etc.; 2. If the patient has excessive psychological stress, long-term tension, anxiety, depression, irritability and other emotions, it can cause certain stimulation to the cerebral cortex, leading to a decrease in the secretion of thyroxine, thus triggering goiter; 3, lack of iodine in the body: if the patient has insufficient intake of iodine, the lack of iodine in the body can lead to excessive synthesis of thyroid stimulating hormone, thus causing excessive hyperplasia of thyroid cells and triggering goiter; 4, other: thyroid cysts It may also be caused by bleeding and necrosis of thyroid adenoma and nodular goiter, as well as degenerative changes. It may also be related to the phenomenon of mutual fusion of thyroid adenoma follicles, and may be related to bleeding and necrosis of thyroid tongue duct and thyroid cancer. Whether or not a thyroid cyst requires treatment depends on the nature of the lesion, the size of the cyst and many other factors. In case of benign thyroid cysts, which are small and not accompanied by physical discomfort, no special treatment is usually required, and regular follow-up ultrasound examinations can be performed according to medical advice. If the cyst affects the patient’s daily life, or if it is a malignant cyst with symptoms such as hyperthyroidism, dysphagia and hoarseness, it can be treated with medication such as potassium iodide and methionine under the guidance of a professional doctor, as well as with puncture aspiration therapy, surgery and Chinese medicine.