How do pimples and other forms of acne form?

I%26#039;m 13 years old amd i%26#039;ve been getting pimples around my nose and chin. I want to know how they form and how to get rid of them please. If this helps i get really sweaty from skateboarding all day.|||many teens have oily skin and by washing your face every morning and every night you can avoid acne blemishes. try using PROACTIVE.even a man my age gets a few pimples from time to time. however mine come from shaving too close and the razor pulls at the whiskers and infects the hair follicles.when you start getting a few hairs on your face,wash your face before shaving thus softening the whiskers.im 55 now and i didnt start shaving until i joined the army in 1972.now i have to shave everyday or sometimes twice a day.dont use a deordorant soap to wash your face with. use a soap that will remove oil from deep down in your skin.|||ok--your kidney is not doing a good job of breaking down the fats that are in the body; result, is acne.--Take medicine that will help your kidney to function properly.