Hi ! The symptoms you have described could be both due to infection of the original operated wound, or due to allergic reactions to the adhesive plaster and gauze pieces which got secondarily infected. I would suggest you to visit your surgeon at the earliest to exclude original would infection which may be forming into an abscess
in the left over space by the removal of the cyst
. This will need urgent attention and you can not wait for 3 more days.
Wishing you an early recovery. Thanks.