Whether a thyroid cyst is serious or not needs to be combined with the size, nature and location of the cyst, and cannot be generalized. If the thyroid cyst is small and has no obvious symptoms, it is generally not serious; if the cyst is large, it may cause compression symptoms and respiratory difficulties, which is more serious, and it is recommended to consult a doctor in time. Thyroid cysts are usually benign lesions, which are more common in clinical practice, and are hidden in the early stages and not easy to be detected. Smaller cysts do not have any symptoms and generally do not cause harm to the human body. However, as time passes, thyroid cysts will gradually increase in size and may cause compression of the surrounding tissues, resulting in symptoms such as hoarseness, difficulty in swallowing, and difficulty in breathing. Surgery needs to be considered if symptoms of compression occur. Thyroid cysts can be detected by ultrasound, and early detection of thyroid cysts must be reviewed regularly in the hospital. If the thyroid gland continues to enlarge, it is recommended to treat it under the guidance of a doctor.