Follicular adenoma is the most common type of adenoma in the thyroid gland. Whether or not to operate depends on the condition of the adenoma. If the adenoma is small and asymptomatic, it can be observed regularly; if the adenoma increases in size and causes local pain and discomfort, it can be surgically removed. Small adenomas are usually detected at an early stage without any symptoms and can be observed regularly to see how the lesions change. Larger adenomas may cause pressure on the surrounding tissues, and some of them may cause abnormal hormone levels in the body, so they can be removed through surgery, and most of them can be clinically cured. Follicular adenomas of the thyroid gland increase in size within a short period of time, and require timely medical observation and standardized treatment under the guidance of clinicians to avoid delays in the condition.