Which department to see for thyroid nodules depends on the specific condition of the nodules. If the nodule is relatively small and does not cause local compression symptoms, such as respiratory difficulty, shortness of breath, or difficulty swallowing, then you can visit the endocrinology department to check the functional state of the thyroid nodules as well as use ultrasound to assess whether the thyroid nodules are benign or malignant. If the nodule is large, exceeding ten centimeters, and has caused symptoms such as hoarseness, shortness of breath, and difficulty swallowing, then it is necessary to visit the thyroid surgery department, where surgical treatment may be needed to relieve the symptoms.