In a general sense when using aas you can get androgenic or estrogenic related acne. Obviously the compounds you choose are important. But it is usually fluctuations in hormones that cause acne so that's why it is common at the start or end of a cycle. Most experienced guys I know who suffer from acne tend to get it when they come off (or their gear is fake).
I would try to control aromatization on cycle with an AI (not too high a dose of AI though). I would drink lots of water and eat a nutritious balanced diet full of vegetables, greens, good fats, vitamins and minerals. I would avoid high sugar and milk. Obviously wash morning and night and use scrubs when needed. Some light tanning would be good too.
Supplement wise you want a multi vitamin and a good fish oil. The best thing would be vitamin b5. If your acne is really bad I would use 5g vitb5 morning and night (10g total). Lower to 2.5g morning and night (5g total) and when it is cleared a maintenance dose of approx. 1-2g per day would be good.
For severe cases Accutane (isotretinoin) could be a life changer. This is very strong medication so research lots before trying it. Everyone responds differently to it. I would start at 20mg per day and stay there for a few months. If you need to up then do so but only to 40mg. Acne should worsen the first few weeks but eventually even the most severe cases should disappear if you run it for 6 months plus. Again research this before buying and use with caution. It will make your skin very sensitive to sunlight so winter months would be best. It should dry out lips and possibly eyes too. Everyone has a different response and some are bad whilst others feel fine and get amazing results. It is very toxic too so keep the dose low.