Basic acne is due to an enlarged and plugged hair follicle.
A blackhead is plugged with dirt.
If you have acne, you will develop all types of acne lesions, including papules, pustules, nodules and cysts.
Changing hormone levels is a cause of acne.
Acne is caused by eating greasy foods.
Stress can cause an acne flare.
Acne treatment will depend on what kind of acne you have.