I'd like to add some information to this thread.
I grew up very prone to acne. Most of the times, it is hereditary, and you have no choice whether or not you'll be getting it in your life. That being said, today's technology has allowed us to mitigate and sometimes eliminate it all together. Essentially, the increased amount of sebum and dirt causes the inflammation to occur; creating a pimple or acne. Sweat obviously acts as a catalyst for this to occur. In order to mitigate this, there are a few options. You can dry your skin out and reduce the amount of sebum by using heat or acids e.g. tanning, wipes for acne, and or topical creams. Other ways available are through oral means. The increase in Vitamin A (a fat soluble vitamin I'd like to add)* will encourage the decrease in pore size, subsequently eliminating the amount of sebum or dirt a pore can accumulate. This vitamin also led to synthetic versions of it. The most popular being Isotretinoin or better known as "Accutane."**
I have done a 7-month dermatologist prescribed period of Isotretinoin. I also had to have my bloods (mainly triglycerides) checked once a month, too. Kidney function tests are often tested during the medication cycle as well, but not always. This medication gets a very bad reputation from those who aren't educated. First things first, very similar to AAS cycles, everyone's experience with Isotretinoin is vastly different.*** I experienced little to no side effects during my time with the medication.
If you'd like to know more about the ways of mitigating acne, I'm here. If you'd like to know more about Accutane outside of a Pharm book, or from a doctor, I'm here.
*When taking in Vitamin A (OTC or prescribed), you must take it with fat in order for it to be digested
**Accutane is a medication derivative from Vitamin A. The same dietary recommendations are to be followed as "*" as well
***There are a great deal of side effects associated with the medication, but can be mitigated in several ways
Lastly, take the information and advice with a grain of salt, I'm only a dermatology nurse