What is Acne? Acne/ak’ne/ is an inflammatory, papulopustular skin eruption occurring usually in or near the sebaceous glands on the face, neck, shoulders, and upper back. Its actual cause is still unknown but involves bacterial breakdown of sebum into fatty acids, wax esters, triglycerides, and squalene, irritating the pore surrounding the subcutaneous tissue. To put the full potential of this activity into perspective, one square…