The reason I personally strongly believe than these are related to abx and NOT morgellons:
2 years ago before contracting Lyme, I had to treat a Strep Throat with 2 weeks of ABX:
Those small bumps started to appear on the front of my head.
Whenever I stop antibiotics for more than a month, I notice that they decrease in number.
For these reason, I believe that they are either
A) As the nurse said, related to a high toxic environment in the body,
or B) antibiotics destroy a bunch of good bacteria over/under our skin than leave room for the overgrowth of these things.
Just my 2 cents.
Good luck!