Long bags on the neck are commonly caused by the following diseases: first, enlarged lymph nodes in the neck, which are part of the body’s immune organs. When the body is infected by bacteria, viruses or tuberculosis bacteria, it will lead to enlarged lymph nodes. This can generally be treated by drinking more water appropriately and taking oral medications to clear heat and lower fire, such as Shuang Huang Lian Oral Liquid, etc. If necessary, you can also go to the hospital for blood tests and give anti-inflammatory or anti-viral treatment, such as cephalosporin or ribavirin, according to the test results. Secondly, lipoma formation, which is caused by the abnormal convergence of local fat, usually without medication or surgery, but when the mass is too large, it needs to be surgically removed. Third, sebaceous cyst, which is a disease caused by the blockage of hair follicles, requires surgery to be able to be eradicated. Fourth, the formation of thyroglossal cysts in the neck, which need to be clarified by ultrasound.