Fatty chin and neck without pain and itching may be caused by lipoma, goiter, tumor metastasis and so on. 1. Lipoma: Lipoma is a common benign tumor, which belongs to fat metabolic disease. It is mainly composed of mature fat cells, and can occur in any part of the body with fat, so lipoma may cause patients to appear chin and neck hypertrophy without obvious pain and itching phenomenon. 2. Goiter: Goiter can be divided into diffuse enlargement and localized enlargement, which is mainly caused by iodine deficiency, tumor, abnormal secretion of thyroid hormone and other reasons. Patients with goiter may have the phenomenon of enlarged chin and neck without pain or itching. 3. Tumor metastasis: if the tumor cells proliferate and metastasize to the lymph nodes in the neck, it is possible for the patient to develop the phenomenon of enlarged chin and neck without pain or itching. When the patient’s chin and neck are enlarged but not itchy, it is recommended to go to the hospital to find out the cause of the disease, and then give targeted treatment.