Hey! My boyfriend gets the same type of acne/irritated skin around his jawline sometimes, and he says it's from shaving. He has glowing smooth skin everywhere else. This is honestly what it looks like to me...ingrown hairs and what not. I don't want to minimize the acne on your neck/jawline, but those don't look like cysts to me. It could be hormonal too.
We make our acne much worse by picking it and irritating it with all sorts of scrubs and washes. I believe that so many acne ads really make one's skin worse! They only want your money.
This is what I've recommended to everyone on this site who has body acne. I did all these experiments for a year, and have found what has cleared my body acne. I've had it since I was 11.
1. Throw away all washrags, scrubbers, shower scrubbers, body washes or anything that will "exfoliate" your skin. Honestly all it's doing is irritating your skin. Your skin retaliates from begin irritated and breaks out. I only use papaya soap on my body, which definitely helps with red marks and has really smoothed my skin. I avoid soaps with sodium lauryl sulfate in it. That SLS really irritates my skin.
2. Look at the shampoo you're using. Head and shoulders may be nice, but it still has SLS. I would recomment Aveda scalp benefits shampoo. I don't know where you live or if it's accessible to you. But this shampoo has also helped clearing my body acne completely. I've been using it for a year now, and once I used another a knock off brand of head and shoulders, and broke out in huge zits all over my neck, jawline, scalp, and back. I buy the huge bottle and it's expensive, but it lasts me about 10 months. It's totally worth it to me to have clear skin. If you can't afford this, I would look into a sulfate free shampoo...but be ware...not every "organic" or all natural shampoo is equal.
3. Stop washing your clothes, towels, and sheets in detergent. Again, all those soaps have these unnecessary fragrances and perfumes that will irritate acne-prone skin. Sometimes, the detergent never dissolves and actually stays on your clothes. I only wash my clothes, towels, and sheets in hot/warm water with a little bit of liquid soap (wisk). Periodically I've broken out on my back, and realized my sister would leave those bounce dryer sheets in the dryer...! The fragrance from those broke me out.
4. Be patient...it takes time to heal. There will be ups and downs.
I hope that you can begin to make these simple changes. I had acne on my body much much worse than you...I had painful deep cysts everywhere.
/ Oh btw, I don't use any topicals on my body. I however use finacea on my face and neck, which if you look at my blog and pictures you'll see my results with it.
Best of luck to you bro. Feel free to message me or give us an update!