The thyroid gland is located roughly in the neck, below the thyroid cartilage in the neck, on either side of the trachea, and is shaped like a butterfly. The thyroid gland is about 5 centimeters in size and is located below the thyroid cartilage, spread out on both sides like two leaves, shaped like a butterfly, with an isthmus in the middle connecting the left and right lobes. It can be detected by ultrasound, which can be touched by a professional, and if the thyroid gland appears enlarged, a prominent lump can be seen in the neck. The thyroid gland is the largest endocrine gland in the human body. The thyroid gland is able to regulate the calcium-phosphorus balance of the body and promote growth and development, as well as regulate the metabolism of sugar, fat, and protein, which affects many of the body’s physiological functions. If you find an abnormal lump in your neck, you should seek medical attention.