There is no “best way” to prevent thyroid nodules. Generally speaking, thyroid nodules can be prevented by eating iodine-containing foods moderately, maintaining a healthy lifestyle, and reducing exposure to radioactive substances, etc. However, its pathogenesis is complicated, and it may not necessarily be able to effectively prevent the occurrence or progression of thyroid nodules, and it should be determined by the individual’s situation. 1. Moderate intake of iodine-containing food: Iodine intake is closely related to thyroid nodules. Thyroid nodules are likely to occur in iodine-deficient areas, and the incidence of thyroid nodules is also very high in places where iodine is in excess of the standard, so it is important to eat iodine-containing food moderately, not too little and not too much. 2. Maintain a healthy lifestyle: too much stress for a long time, lack of exercise, excessive tension, depression, anxiety, exertion, overweight or obesity will cause endocrine disorders, decreased immunity and may induce thyroid nodules. 3. Reduce exposure to radioactive substances: Radioactive substances may induce the occurrence of thyroid nodules. For more information, please consult your doctor.