Acne will form when all the conditions are right and the skin pores become clogged with dirt and oil combined. As long as you do not touch your face, with your hands, you can avoid getting acne on a regular basis.
This will help to a degree, but you may still get acne if you are prone to it. If you do not take care of your face, keeping it clean everyday, acne will definitely show up. The skin cells on your face die each day, and new ones form. It is a cycle that occurs throughout your entire life. If you have clogged pores, this is usually the result of not scrubbing your face on a daily basis to remove the dead skin cells.
When acne starts to appear in places that it has never shown up before, and you are an adult, then you are suffering from hormonal changes which affect your skin. Of course, women can have acne develop out of nowhere. They are usually pregnant with their hormones fluctuating quite a bit. You really should seek the help of your physician if you have acne show up for no reason though. If the doctor is not able to diagnose why you have acne, they may run a few tests. Therefore, since we are not smarter than the average doctor (we do not have a medical degree), we cannot say why it is happening either. In most cases, acne is just a skin condition. However, it can be a precursor to more serious conditions your body may develop.
Going to the doctor is probably not necessary for most teenagers with acne, but if it's really bad, you might want to go see one for the following reasons. You will receive a referral to a dermatologist who will be able to accurately diagnose your precise type of acne. If you do have severe acne, you may have to get the appropriate medications to deal with it. Stopping acne before it gets too bad is the best way to prevent severe scarring on your face which may occur. It is very tempting to squeeze the blemishes. However, if you do this, you may end up with scars, which is why your doctor will advise you to avoid squeezing them.
As you continue to look for a solution for your acne, dealing with it being on your face is actually the hardest part of this process. How to care for your skin is what you need to learn. Hopefully, as you are researching, you will find a proper acne treatment. For some people, there is important information about skin care, in general, that will help with keeping the skin protected and clean.
References:
http://acneassassins.com/sulfur-for-acne
http://www.youtube.com/watch?v=2gkTKtKeaug
