B-ultrasound thyroid lesions refer to the thyroid lesions seen under B-ultrasound. The common ones are thyroid nodules, diffuse goiter, thyroid cysts, thyroid adenoma, thyroid calcification, and vascular enrichment or thyroid atrophy. When these lesions are found by B-ultrasound, further check thyroid related antibodies, thyroid function, and if necessary, check thyroid static imaging, or iodine uptake rate to further determine the specific thyroid lesions. Common thyroid diseases include hyperthyroidism, hypothyroidism, subacute thyroiditis, chronic lymphocytic thyroiditis, goiter, thyroid nodules, thyroid tumors, etc.