Thyroid nodules are small lumps that can form in the thyroid gland, which is located in the front of the neck. These nodules can vary in size and are often discovered during routine medical exams or imaging tests. Most nodules are benign, meaning they are not cancerous, but some may require further evaluation to rule out thyroid cancer. While many people with thyroid nodules experience no symptoms, some may notice swelling in the neck or changes in their voice. Doctors may use ultrasound or a biopsy to assess the nodules. Treatment options depend on the size and nature of the nodules, as well as any associated symptoms.