There are many reasons that can cause the thickening of the neck, mainly physiological reasons and pathological reasons, which also need to be considered in combination with other factors. If it is caused by physiological reasons, it can be relieved by diet and exercise, etc. If it is caused by pathological reasons, patients need to be treated by drugs, surgery and other means. I. Physiological factors 1. Fat accumulation: Due to diet, lack of exercise and other reasons, the patient’s body fat increases and fat accumulates under the skin around the neck, resulting in thickening of the neck. Patients can carry out some targeted exercises to reduce fat and make the neck thinner; 2. Developed head and neck muscles: some fitness exercises increase the strength of each muscle group in the neck and back at the same time, the muscle fibers become thicker and visually, the patient’s neck becomes thicker. Patients are advised to coordinate the exercise of various muscle groups of the body. Second, pathological factors 1, hyperthyroidism: due to hyperthyroidism secrete too much thyroxine, so that the thyroid gland enlarges, and then the neck becomes thicker. In addition, patients with hyperthyroidism may also have symptoms such as irritability and insomnia, palpitations and fatigue, and need to take antithyroid drugs for treatment. 2. Simple goiter: Generally caused by insufficient iodine intake by the patient, genetic and environmental factors may also cause certain effects. Insufficient synthesis of thyroid hormone causes the pituitary gland to secrete excessive thyroid stimulating hypertrophy of the thyroid gland. In this case, patients need to take drugs that inhibit the synthesis and release of thyroid hormones to relieve symptoms; 3. Other: some pathogenic bacterial infections, rheumatic immune diseases, and tumor diseases can lead to enlarged lymph nodes in the neck, making the neck look thicker. Patients need to perform medication or surgery according to the cause.