injection site cyst

I have not had one of these in nearly 14 years, but last week I discovered a hard lump on the side of one of my alpaca females. I suspected it was an injections site cyst, and waited for it to erupt, then cleaned it out with warm soapy water. Got the nasty stuff out and then flushed it. It has healed nicely. and yesterday I discovered one on one of my black girls. Am waiting for it to erupt, and since tomorrow is herd health day, will deal with it then. It never fails, if it is raining, it is pouring in more than one sense. At least this is something with which I can deal without going to the vet. Good thing I have Betadine on hand with which to flush it out this time. Checked on the cheek, and it is healing nicely.