Pustule

• A circumscribed elevation that contains pus.
• Pustules are usually less than 1 cm in diameter.

• 

  Severe pustular acne in an adolescent.

• 

  Small pustules with surrounding erythema of folliculitis.

• 

  A pustule of mpox with surrounding erythema.

• 

  Numerous pustules of neonatal acne clustered on the cheek and lower forehead.