What will happen if your thyroid levels are high?

Hyperthyroidism: If you are hyperthyroid, it uaually causes symptoms; common ones are heat intolerance, palpitations, nervousness, tremor, diarrhea, irritability. It causes bone loss (osteoporosis) over time. It places a stress on your heart, which may be tolerated when young, but not with aging. Commonly caused by graves disease, toxic nodular goiter. It can be treated; you may need to see an endocrinologist.