I got it bad for years on test when i was younger. I didnt know my limits an was taking 500mg a week of test e and dbols and because of that 1 time it left me with acne scars on my chest an back..cause once it started it took like 6months before it cleared up,for me the problem is the longer acting tests because its so built up i cant keep the acne under control so i learned ways around this problem. now i take test prop/an or sust and if i even think i feel a zit coming on, I can keep it under control with timing shots diffrently also doxycycline has been a big help. Tren and test are the only things by themselfs that bother me..Thats why i love cutting no sides .primo,turinabol proviron through the summer,no acne no estrogen worrys and bodyfat drops from 13 to 9% just from stoping the test..wont be long now spring will be here