Acne forms when pores or hair follicles become clogged with oil, dirty or dead skin. It appears on the face, back, chest, neck and shoulders. While acne is commonly associated with teenagers, this skin condition can strike at any age. Acne scars appear after the swelling and this can cause lack of confidence or low self-esteem. Avignon Clinic has developed an end-to-end program to manage acne and scars.