dear citrix, hello and welcome to health care magic.
Bumps on the back is typical of a sebaceous cyst
. a simple way of removing them is by a small surgical technique. cyst is removed intact with minimal sutures. chances of recurrence will be there if cyst not removed completely.
Infection also may occur in cysts that are meddled.
hence kindly visit your nearest surgeon for a review and suggestion.
thank you and take care.