Blackheads are one of the few types of acne that may be caused by skin hygiene and will never go away on their own. Cleaning your face regularly will prevent most blackheads altogether. They are caused by follicles that have a wider opening than normal.
About Acne – What can you do to cure or alleviate acne?
The processes going on in the skin of a person suffering from acne are explained here. You also find a survey of the factors causing acne and measures you can apply yourself to prevent, cure or alleviate acne.