Thyroid nodules are very common and a very small percentage of thyroid nodules or tumors are found in daily outpatient clinics by patients who feel them themselves in the shower. Therefore, it is possible for patients to self-examine thyroid nodules, and proper guidance from a doctor is needed here. In normal people, the thyroid gland is located under the skin in the anterior mid-neck area, below the thyroid cartilage (laryngeal node), in front of and to the side of the trachea, and is usually invisible and symmetrical in the neck. When the thyroid gland becomes diseased, it is often enlarged. When a nodule grows in the thyroid gland and reaches a certain size, it often causes asymmetry in the neck and can be easily seen or detected. When a nodule grows in the thyroid gland, it is possible to detect it yourself by following the correct methods Observation: preferably indoors in natural light, the patient looks into a mirror and carefully observes his or her neck to see if it is symmetrical and if there are any localized bumps, looking first in front and then slightly sideways. Look flatly in front of the mirror and do the swallowing action repeatedly 3-5 times, then slightly tilt the head back and do the swallowing action repeatedly 3-5 times to observe whether there are any up and down mobile nodules. Palpation: If a suspicious nodule is found, palpation is done in front of the mirror by touching the right side of the trachea and neck with the left hand and the left side of the trachea and neck with the right hand. The texture of the lesion is carefully experienced during palpation, and swallowing can be done during palpation. When an abnormality or nodule is suspected by observation and palpation, seek prompt specialist consultation.