Gud morning!what is more dangeruos?hypo or hperthyriodism?

Hard to say: Both can be very serious if not treated. The best course of action is to follow your doc's advice and take your medicine to properly manage your thyroid rather than having to deal with either one.

Both have problems: Both could be dangerous, hypothyroid for instance could cause heart disturbances as could hyperthyroid. The latter is harder to treat i.e. Surgery vs radiation ablation. Hypothyroid is easily treated by a thyroid pill a day.