Acne is a skin condition that occurs when your skin pores/follicles become blocked with oil and infected by bacteria, dirt and debris. This often affects teenagers and young adults, although it can occur at any age.
The different types of spots include blackheads, whiteheads, papules, pustules and nodules. These spots can be painful and sore. Acne, if not treated properly can leave scars like dents, raised marks and uneven skin tone.