just all depends. I have the same issue with tren. Ill save you the long story, but in short It took me over a year on accutane and trying various things to learn that tren was causing an autoimmune response. Ive seen numerous dermatologist and even had a biopsy sent to UCSF and no one has really figured out whats going on. My theory is that tren (just like most other steroids) creates an increase in sebum production, which increases the amount of p. acne bacteria. And for whatever reason because of this change and tren in the mix it creates an autoimmune response. The reason for me telling you this is because you may not be able to run tren if it's only happening on tren as was the case for me.
You can pm me a pic of the bumps and I can try to help you nail down what it is. Sounds like folliculitis though. Accutane will definately clear up whatever it is. Dont believe the hype....accutane is a miracle drug that actually cures the disease not the symptoms. In the mean time you can try putting ketoconozole shampoo on the area twice a day and clindamyacin after the shampoo dries.