What's the cause of bacne? How to reduce bacne? How should I workout without having bacne?
There are so many different causes for different people. Diet plays a large part, but what foods trigger it are different for people... It could be your even using the wrong body soap, or your clothing detergent, or the fabric content of your shirts. Stress is a factor. Sleep patterns. The body is such a complex balancing act, one change somewhere can affect a lot.
Changes in habits or weather can do it, like when the weather gets hot, I find more issues around where i wear my backpack. If you've started a job where you sit with your back against a chair a lot...
Try washing asap after workouts.
Try reducing salt in your diet.
You can try phases of cutting various typical food triggers, like a week or two without dairy, see how that goes, then go back on and a week later try two weeks without gluten. It's difficult to nail down health triggers, because there are so many variables in life. But if you can think about what has changed in your life since you noticed more acne, there's a greater chance that has something to do with it.