Frequent hand punching may have an effect on the thyroid gland, but it will not cause serious damage and generally will not cause thyroid disease. However, frequent hand punching will have many effects on the body, which may not only lead to low immunity, mental weakness, kidney deficiency, impotence and premature ejaculation, but may also lead to endocrine disorders, which may affect the normal thyroid function, and may even lead to imbalance of the five items of A function and induce hypothyroidism. So it is recommended that male friends for their own health, must not frequent hand flushing.