Relax!
I had that too and it did freak me out as well. These are the little glands that are trying to work. Actually they are working but need new "plumbing" It should disappear soon as you continue to heal (1-2 weeks?) at least it did so in my case if I recall correctly.

M

Of course if this persists you should talk to your medical team anyway. It would be nice if one was warned about stuff like this beforehand.