This is how dangerous thyroid nodules are: there is a risk of atrial fibrillation and osteoporosis. Experts recommend having a laboratory test or an ultrasound scan from the age of 65.
To treat hot nodules, which are almost always benign, medication, especially radioiodine therapy or surgery, can sometimes be considered. In any case, you should take action as you get older, even if you have mild hyperthyroidism, in order to reduce the risk of osteopsorosis and stroke.