Children with thick necks and no pain or itching may be caused by obesity, heredity, hypothyroidism and other reasons. 1. Obesity: children often eat high-fat and high-calorie food, lack of exercise, obesity can occur. The patient’s neck, stomach, arms and other places can appear fat increase phenomenon, which can cause the child’s neck thick, and painless phenomenon. 2. Heredity: when the child’s parents have a large neck, the child may also be inherited to the phenomenon of a large neck, at this time the child will not feel uncomfortable. 3. Abnormal thyroid function: patients may suffer from goiter, which is mainly due to various reasons that constantly stimulate the thyroid gland to release more hormones and may cause the gland to become bigger, thus resulting in the phenomenon of a child’s thick neck without pain or itching. It is recommended that when a child’s neck is large and not itchy, he should go to the hospital in time, do the relevant examination, clarify the cause of the disease, and then follow the doctor’s instructions for treatment, so as to avoid delaying the condition.