These are perfect illustrations of the underlying cause of acne. Old dead surface cells form plugs which block the underlying sebaceous glands. These glands fill up with their oily secretion and then rupture into the dermis causing inflammation, resulting in the red pimples (pustules) of acne. Acne has nothing to do with infection, diet or inadequate cleansing. Acne treatments which fail to address the issues of OBSTRUCTION and INFLAMMATION are likely to be unsuccessful. Make an appointment at SKIN DOCTOR SA for sound advice on acne and treatments based on SCIENCE, not pseudo-science.