Acne is a skin condition in which the pores of the skin get clogged up with excessive oil acne occurs when sebum the oily chemical is unable to pass from inside the skin where the sebaceous gland is located to the skin layer and the skin pore becomes clogged or the skin cells themselves grow in abundance and clog the pore either way because sebum cannot exit the skin and dead skin cells begin to pile up bacteria begins to start growing this mixture of bacteria excessive skin cells an