Pimples

When the follicle becomes filled with oil, dead cells, and bacteria, it often swells and ruptures causing the debris to escape into the dermis. The debris is irritating and causes an inflammation. White blood cells rush in to fight against the bacteria and create pus, a sticky, yellowish secretion. This is the beginning of a pimple and appears as an inflamed, red or blue-red lump.

When the overloaded follicle ruptures near the surface of the skin it is not so serious and will usually heal rapidly leaving no permanent mark. However, if the follicle breaks deeper underneath the skin, it will be more severe and may take longer to heal, leaving permanent scars.

When pimples are pinched or squeezed, the infectious material can spread to surrounding tissues, but common acne is not spread from one person to another. Unless proper treatment is given, permanent scarring can occur.