Small bumps on the bottom of the neck may be caused by molluscum contagiosum, filiform warts and other diseases. The patient can follow the doctor’s instructions to use appropriate treatment according to the different causes, such as physical therapy, surgical treatment. 1. Molluscum contagiosum, also known as the skin, if the molluscum contagiosum causes the neck to grow small bumps, the patient can follow the doctor’s instructions for liquid nitrogen cryotherapy, through the liquid nitrogen cryogenics necrosis of diseased tissue, the molluscum contagiosum removed. 2. Filiform warts: If you have filiform warts due to a viral infection that causes small bumps on the bottom of your neck, you can take cryotherapy, electrocautery and other physical ways to remove them. You can also get rid of filiform warts with a laser. There are many reasons for the growth of small bumps under the neck, it is recommended that the patient to the hospital for relevant examination, to clarify the cause of the disease, and cooperate with the doctor to standardize the treatment.