Acne vulgaris is the formation of comedones, papules, pustules, nodules, and/or cysts as a result of obstruction and inflammation of pilosebaceous units (hair follicles and their accompanying sebaceous gland). Acne develops on the face and upper trunk. It most often affects adolescents.

Subtypes of acne within these two categories include:

• blackheads.
• whiteheads.
• papules.
• pustules.
• nodules.
• cysts.

Acne vulgaris: This is the medical term for common acne, which distinguishes it from less common forms of acne, such as cystic and nodulocystic acne. Androgens: These are a type of hormone that stimulate the oil glands and hair follicles in the skin, which can lead to acne.

Nodular acne forms when a type of bacteria called P. acnes that live on the skin get trapped inside the clogged pore. This may lead to an infection that affects the deeper layers of the skin. The infection can cause inflammation in the deep skin layers, creating hard nodules.

Hormonal acne is when breakouts form in adulthood that could range from blackheads and whiteheads to painful cysts. Hormonal acne is linked to the overproduction of sebum (an oily substance in skin glands), which clogs pores, leading to pimples.

Acne is a disorder of the hair follicles and oil glands (sebaceous glands). The sebaceous glands secrete oils (sebum) to keep the skin moist. When the glands get clogged, it can lead to pimples and cysts. Acne is very common. People of all races and ages have acne.

An acne nodule looks like a small bump under your skin. It may be skin toned, but it can also turn red as the surrounding area gets more inflamed. It doesn’t have a “head” like a less severe pimple might. Nodular acne is also painful to the touch.

Put simply: Grade 1: Open comedones Grade 2: Open and closed comedones and some papulopustules Grade 3: Pustular Acne Grade 4: Nodulocystic Acne

Acne is a common skin condition that happens when hair follicles under the skin become clogged. Oil and dead skin cells plug the pores, and outbreaks of lesions (often called pimples or zits) can happen. Most often, the outbreaks occur on the face but can also appear on the back, chest, and shoulders.

In general, acne is defined as plugged pores, pimples, and cysts (which go deeper under the skin than pimples) that occur on the face, neck, shoulders, upper arms, and upper back or chest.

4 Stages of Acne State 1: Mild Acne. This first stage of acne usually consists of a small concentration of pimples and/or blackheads on the skin. Stage 2: Moderate Acne. Moderate acne consists of blackheads, pustules, papules and pimples on the skin. Stage 3: Moderate to Severe Acne.