The most common cause of acne is a hormone surge that stimulates production of oil, or sebum.  This natural oil combines with dead skin cells to form a plug in the pore, causing the acne bacteria to grow. 

In its simplest form, the irritation becomes a whitehead.  If the plug becomes open to the surface, it may oxidize and darken, turning into a blackhead.  These types of blemishes are known as non-inflammatory acne.

Pimples develop when there is a break in the wall of the pore; white blood cells rush in and rise to the surface, creating inflamed and sore pimples– classic “zits.”  CLARO was designed to treat common pimples, known as mild to moderate inflammatory acne.