Hyperthyroid patients can eat watermelon if they are not allergic to watermelon, but they should pay attention to moderation to avoid gastrointestinal discomfort caused by eating too much. Hyperthyroidism is the abbreviation of “hyperthyroidism”, which is caused by excessive production of thyroid hormones by the thyroid gland, and the clinical manifestations include agitation, hyperphagia, loss of weight, and protruding eyes, etc. Watermelon is a common fruit that contains almost no iodine, so if you are not allergic to watermelon, you can eat watermelon. Watermelon is a common fruit that contains almost no iodine and can be eaten in moderation by hyperthyroid patients without allergies. However, watermelon is not low in calories and sugar. Excessive consumption is not conducive to healthy weight control and may cause gastrointestinal discomfort. Hyperthyroid patients should avoid iodine in their diet, avoid iodized salt, seafood, seaweed, nori and other iodine-rich foods to prevent an increase in thyroid hormones and aggravate the condition. If the patient suffers from hyperthyroidism, it is recommended to have a reasonable diet and standardized treatment under the guidance of a doctor.