"Acne" is a type of skin disease in which the secreted sebum gets together in the tiny holes of the skin and gets trapped there. Acne appears on the face, back, shoulder, neck and chest. "Pimples" is a form of acne.
Acne is not only painful but also embarrassing. It is characterized by red pimples which usually occur on the face chiefly on teenagers. Even more embarrassing are the scars and pimple marks that are left behind after the pimples have healed. The scars will always remind you of the pain you went through when you were battling these pimples.
However, it is worth noting that most of these scars will fade away in a few months. These acne scars and pimple marks should not make you feel helpless as there are a few things that you can do to remove them and therefore preventing further hyperpigmentation.