Is it something that happens after the injection and then disappears quickly ... and is it getting worse?
Doesn't sound like this is anything to do with injection site - alcohol wipes can cause problems.
It may be that you are seeing your body getting more efficient at fighting problems as a result of the supplementation.
If you are worried about the rash then I'd suggest trying to see the doctor about it ... they tend to be much more comfortable with something tangible like a rash
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