Natural causes- These are some what beyond your control and acne happens to most teenagers when they enter puberty. This normally takes place due to hormonal changes also acne can be hereditary in some cases and might occur as it is in the family. But these are beyond your control and you can't do much about these.
Pollution- This is something most people don't care about when they are busy walking around in their daily life. Pollution is known to be one of the major factors which causes acne in people. Therefore make sure you stay as much away from pollution as possible.
Eating too much oily stuff- Do you like eating fried foods? Well it might taste good but fried food is known to be another major factor which might lead to a bad condition of acne. The more you eat the more chances you have of getting acne at some stage therefore try to have a balanced diet and add some greens in your diet.
Using dirty pillow covers- This is something which people don't even care about. Do you know that your pillows can be a major cause of acne especially when they are not washed? Make sure that you change your pillow covers once every day.
What you don't know yet- I know that what I am about to reveal to you can be almost impossible to believe. But it is 100% truth! Do you know what you can cure any sort of acne within 3 days? Seems impossible right? Well see for yourself follow this link- Get Rid of Acne Within 3 Days