A small bag on the neck that doesn’t hurt or itch may be caused by diseases such as molluscum contagiosum, filiform warts and lipoma. 1. Molluscum contagiosum: It is a common benign skin tumor, which may be related to obesity, diabetes, viral infection and other factors. The main manifestation of the skin surface of the high with the tip of the organisms, can be filamentous, smooth surface, preferably in the neck, the patient can appear on the neck of the long small bag does not hurt, itchy situation. 2. Filiform warts: Filiform warts are caused by human papilloma virus infection. The skin lesion is a wart-like bulge on the surface of the skin, normal skin color or brownish-gray, can be in the face, neck and other parts of the face, usually patients do not have self-conscious symptoms, manifested in the neck to grow small bags do not hurt, itchy. 3. Lipoma: the etiology of lipoma is not yet clear, may be genetic, chronic inflammation, systemic lipid metabolism abnormalities and other factors. Patients can appear in the neck subcutaneous one or more lumps, mostly without conscious symptoms, manifested as a small bag on the neck painless and itchy. There are many reasons that lead to the growth of small bags on the neck without pain and itchiness, and it is recommended that patients go to regular hospitals and undergo relevant examinations, so as to clarify the cause of the disease.