Double chin or goiter can be distinguished from the site, touch, weight loss will be eliminated, etc. If necessary, seek medical attention. 1. Location: double chin is usually located in the lower jaw; thyroid gland is located in the front of the neck, on both sides of the trachea. 2. Tactile sensation: the double chin is soft and pendulous; the thyroid gland is fixed to the trachea and the cricoid cartilage by the suspensory ligament of the thyroid gland and the lateral ligament of the thyroid gland; therefore, the thyroid gland moves up and down with the swallowing action, which is the basis of identifying whether the neck lumps are related to the thyroid gland in the clinic. 3. Whether weight loss can be eliminated: double chin is usually increased fat, weight loss can be eliminated; thyroid gland is the body’s inherent structure, weight loss will not shrink or eliminate. It is recommended that obese people with double chins actively lose weight, and patients suspected of having thyroid abnormalities should go to regular hospitals in a timely manner to improve the relevant examinations, and standardize the treatment under the guidance of doctors to avoid delays in the condition.