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[eddie]

Parasites can do that too, but most likely a cyst.
Cysts can be caused by a number of things, so don't beat yourself up over it.

But typically, the cyst will be drained, a check will be done for internal parasites and antibiotics will be given in either shot form or a topical ointment.
Some times worm treatment will be done if parasites are determined to be the cause.
[addsig]