A doctor will examine the lump carefully, because any swelling on the neck should be checked by a professional.
If it is a cyst, the area is numbed, a small opening is made, the contents are drained and the sac is removed to stop it from coming back.
Afterwards the spot is cleaned and covered, and it should be kept clean and dry while it heals.
Washing behind the ears every day and not squeezing bumps at home both help prevent new cysts and blackheads.
Stay the course and look after your skin. The videos below show cysts near the ear and neck being treated by professionals.