J'ai 61 ans et j'ai toujours des grandes chaleurs, est-ce grave ?

Hello, 3 years ago I did an ultrasonic imaging of my thyroid, and some anomalies were present (I don't recall exactly the terminology). However, after doing a blood test, my thyroid hormone levels were in their normal ranges, so I did not follow any treatment after that. My question is: Should I do another check for my thyroid? And how do I know if I have major thyroid issues (I am in my early 30s). Thanks.