MICROANATOMY

Detailed explanation-1: -Acne is a common condition that affects millions of people in the U.S. It most often begins in puberty, when male sex hormones-known as androgens-increase in both boys and girls, causing the sebaceous glands to become more active and produce more sebum, commonly known as oil.

Detailed explanation-2: -Sebaceous glands secrete an oily substance called sebum. This helps protect the skin from the outside environment. Due to an overgrowth of oil-producing cells, sebum can become trapped inside the gland, causing it to swell and form a bump under the skin. This is known as sebaceous hyperplasia.

Detailed explanation-3: -Acne is an inflammatory disorder of the skin, which has sebaceous (oil) glands that connects to the hair follicle, which contains a fine hair.

Detailed explanation-4: -Acne vulgaris is characterized by noninflammatory, open or closed comedones and by inflammatory papules, pustules, and nodules. Acne vulgaris typically affects the areas of skin with the densest population of sebaceous follicles; these areas include the face, the upper part of the chest, and the back.