The thyroid can be checked with menstruation. The thyroid gland does not change during menstruation because of menstruation, and if the thyroid gland is diseased, the lesion will not appear abnormal during menstruation. When a woman is menstruating, the hormones in her body are elevated, mainly estrogen and progesterone, which may affect the lining of the uterus and also the mammary glands. However, there is no effect on the thyroid gland, which is usually not affected by thyroid hormones and does not lead to goiter as well as congestion and hyperplasia of the thyroid gland. If there is a pathology in the thyroid gland, such as inflammation or nodules, menstruation will not cause the inflammation to worsen or the nodules to increase in size. Therefore, a thyroid test can be done during menstruation with no effect on the results and will not cause inaccurate results due to menstruation. The thyroid gland belongs to the endocrine organs, for the thyroid function examination, the main thyroid color ultrasound examination and thyroid function examination. It can diagnose whether there is hyperthyroidism or hypothyroidism, and can detect and diagnose thyroid-related diseases at an early stage, so as to formulate a better treatment plan and prevent further aggravation of the condition.