The sebaceous glands and hair follicles that we have on the face, neck, shoulders, back and chest often get irritated because of the pores blockage and that’s the way the acne appears. The pimples, whiteheads and blackheads appear because of the excessive oil quantity produced by those glands in combination with the dead cells on the surface of the skin; Those and the impurities in the atmosphere are the factors that clog up the pores and cause the whiteheads and blackheads.

The next step is the entering of the microbes in the skin through a whitehead burst and generates a pimple; after this most of us are tempted to squeeze the pimples and this is the cause of scars and signs that can last for a very long time.   More detail...