Acne is a disease of the hair follicle/pore caused by a variety of factors including hormones, sebum (oil), and bacteria. Despite being more prevalent in adolescence, it often affects many age groups and can be associated with a significantly decreased quality of life in those with severe disease.
Many people believe it is a self-resolving problem; however, many individuals have bad enough involvement that leads to scarring, which will last a lifetime. Scarring is much easier to treat than prevent. Thus, it is paramount to see your dermatologist before this process begins.
There are several over the counter products for happy that are often sufficient for mild acne. When these treatments fail, it is time to see a dermatologist.