Why most of the teenagers have a acne?

Acne: During puberty, there is an increase in sebum production in the skin. Sebum and skin debris clog pores and the blockage results in inflammation. Gently cleaning the surface of the skin and applying acne medications such as benzoyl peroxide or prescription clindamycin help reduce the bacteria and clean up to the top layer of the skin allowing the pimples/comedones to clear over time.

Acne: is a desease of folliculer canal of the sebeceus follicle with excessive sebum and proliferation of the bacterium P.acnes under the influence of the surge of harmones that happens during adolescence