Once it is visible, acne can be white, black or red. They can start as a pinpoint to over 1 inch in size. They can be in the upper layers of skin or may even penetrate deep within the skin. They can thus take either of the forms:

• Blackheads
• Whiteheads
• Crusting of skin eruptions
• Redness around the skin eruptions
• Cysts
• Scarring of the skin