I think you have to treat your skin cells like a car. If it gets clogged by other particles which do surround our atmosphere your cells will break down maybe not to the point of death but of exhaustion. This is where your car err your cells rather require maintenance!

These are simple problems i've had that help acne form:
oil from hair,
whatever I ate, (the particles from the food that help clog pores)

ways to help yourself!

Getting outside! Rays help to purify your skin. In other words it helps it modulate better or run properly. If your like me - a hermit or also known as 'vampire' who stays in most of the time it is great to consider getting some outside - sunshine. You can make it a fun relaxing experience, a place and where if you have to drive, so be it!

I've heard that what you eat doesnt neccisarily cause acne and that acne is usually a bacterial infection! So helping your skin be more resistant to outside factors helps

shower daily if you dont.. Make it a good habit. You can omit shampoo for every other time you shower or every other day useage (personal tip). This helps your skin to breath, in any way you can think of helps. I'm just posting this for a natural way of looking you can google the rest >_>..

Remember your body is like a car it has to process. Take care of your skin it is a vital organ! 8)