The reason why the right side of the neck is thicker than the left side of the neck may be physiological or pathological. However, if the right side of the neck is thicker than the left side of the neck is more obvious, then we should consider pathological factors, such as thyroid disease, neck lymph node hyperplasia and enlargement. Subject to human growth and development and muscle activity, daily habits, the body is not completely symmetrical, the left and right neck may be slightly different, is a normal physiological phenomenon, generally do not need special treatment. However, the more obvious difference suggests some pathologic diseases. For example, hyperplasia of the right side of the thyroid gland or thyroid tumors may lead to thickening of the right side of the neck, inflammation and enlargement of the right cervical lymph nodes, and cervical vertebrae deformity. Antibiotics (penicillin, cephalosporin, etc.) or surgery may be necessary. Please follow your doctor’s instructions. There are many other reasons why the right side of the neck is thicker than the left side of the neck, and it is recommended that the patient go to a regular hospital in time, and give targeted treatment after the doctor clarifies the cause of the disease.