It is recommended to eat in moderation. Thyroid cysts are one of the common benign occupational lesions of the thyroid gland. The growth of cysts is very slow, and generally, there are no uncomfortable clinical symptoms. Occasionally, when there is bleeding within the cyst, there can be local pain and a rapid increase in the size of the mass.

The cause of thyroid cysts is not yet very clear, and it may be related to iodine metabolism. Some scholars believe it is related to iodine deficiency, while others think it is related to excessive iodine intake. Seaweed contains a very high amount of iodine. It is advisable to eat seaweed appropriately, but it is not recommended to eat seaweed daily. Eating seaweed daily can lead to an excessive intake of iodine, which might further develop the thyroid cyst or cause multiple thyroid cysts to appear.