HOW DOES ACNE DEVELOP? The skin has tiny holes or pores that can be blocked and hair follicles become plugged with oil, and dead skin cells. And occurring this condition is known as acne or pimple needs cosmetic attention when developing regularly and causing the reason for crop out another. When the skin comes in air exposure, bacteria get a chance to grow and worsen the condition with severe black & brown heads. Effective acne treatment is available in the cosmetic world that must be taken when the problem becomes severe.