In the clinic, many patients inquire about what they should pay attention to in terms of diet. Some patients may think that a tumor in the thyroid gland is iodine deficiency, which is a wrong viewpoint, but in fact, it is not the reason, and it is not the same as iodine deficiency disease (macular neck disease). Studies have found that both high and low iodine are detrimental to thyroid health. Patients should be careful to eat a lot of light food, and spicy food must not be eaten. Some patients want to have a big tonic after going back to the hospital and eat a lot of tonic food every day. In fact, a normal light diet is enough, and there is no need to have a big tonic, which also has a negative impact on the thyroid gland.