Hard pimples on the neck do not go away, you should go to the hospital in a timely manner in order to clarify the cause of the disease, according to different causes to give symptomatic treatment. The common causes are warts, fibromas, lipomas, etc. 1. Warts: an infectious disease caused by human papillomavirus infection, it is difficult to subside on its own, will also be manifested as a hard acne on the neck, at this time can be used externally imiquimod ointment, fluorouracil ointment, etc., or the use of frozen, laser, surgical excision and other methods of elimination. 2. Fibroma: it is a benign tumor originated from fibrous tissue with smooth edge and hard texture. If the size is small and the symptoms are mild, regular observation without surgery can be chosen. If the size is large and there are obvious compression symptoms, surgery should be chosen to remove it. 3. Lipoma: a kind of benign soft tissue tumor composed of mature fat cells, which can be asymptomatic when the volume is small and mostly occurs in the surface area of the body. If the volume is large, when pressure symptoms appear, surgical resection is feasible, and the prognosis is good. When you find hard acne on the neck does not go down, you should go to the hospital in time, in order to clarify the cause of the disease and guide the treatment. Never squeeze without authorization, so as not to make the condition serious, resulting in a bad ending.