The term “Class 1 thyroid nodule” generally refers to a Class 1 thyroid nodule, which is an ultrasound classification. Class 1 thyroid nodules are actually nodule-free and therefore do not require medication. Ultrasound is the most important imaging tool for evaluating thyroid nodules. Ultrasound can determine whether the nodule is single or multiple, the size of the nodule, the morphological features of the nodule, and the blood supply status of the nodule. By evaluating the morphological features of the nodule, sometimes in conjunction with its blood supply characteristics, ultrasound can help determine the risk of malignancy in thyroid nodules. People diagnosed with category 1 thyroid nodules generally do not need to be overly concerned about their condition and can consult their medical professionals for specific treatment measures.