The evaluation of acne begins with a history and physical exam.

Physical findings in someone with acne may include:

• Skin lesions:
• Usually located on the face, back or chest
• Whiteheads
• Blackheads
• Red pimples
• Pimples filled with pus
• Skin redness around the lesions
• Skin cysts:
• Located on the face, back or chest
• Skin redness around the cysts
• Skin tenderness

Tests are not required to make the diagnosis of acne.