Definition

• A cluster of painful tiny (1-3 mm) small bumps or blisters on the outer lip. Typically, there are 3-5 blisters within a ½ inch (12 mm) area. The small blisters often rupture and form 1 big sore (i.e., cold sore)
• Present only on one side of the mouth (i.e. doesn't cross the midline).
• Also referred to as Fever Blisters

See More Appropriate Topic (instead of this one) If

• SORE THROAT
• Penis symptoms or rash, use PENIS SYMPTOMS
• Vulvar symptoms or rash, use VULVAR SYMPTOMS