How to relieve the pain of a large cyst between my neck and shoulder

Hello. Thank you for writing.

When cysts become painful they may need to be removed if they are infected. Sebaceous or skin cysts are slightly hardened, fluid-filled bumps within the skin. They range from pea-sized, at about 1 centimeter across to around 5 centimeters across.

Read more here:
https://www.medicalnewstoday.com/articles/312361.php

Helena