What is the primary lesion in acne?
The primary lesion of acne vulgaris is the comedo, or blackhead, which consists of a plug of sebum (the fatty substance secreted by a sebaceous gland), cell debris, and microorganisms (especially the bacterium Propionibacterium acnes) filling up a hair follicle.
What lesions are present with acne vulgaris?
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.
How do you describe acne lesions?
Acne vulgaris is characterized by comedones, papules, pustules, and nodules in a sebaceous distribution (eg, face, upper chest, back). A comedone is a whitehead (closed comedone) or a blackhead (open comedone) without any clinical signs of inflammation. Papules and pustules are raised bumps with inflammation.
What are 2 conditions that can be confused with acne?
Rosacea is the most common skin condition mistaken for acne. Rosacea causes small red or pus-filled bumps to develop on the skin and leaves the face with the appearance of a chronic flush and persistent redness across the cheeks, nose, forehead and chin.
What are the 3 types of lesions?
They tend to be divided into three types of groups: Skin lesions formed by fluid within the skin layers, such as vesicles or pustules. Skin lesions that are solid, palpable masses, such as nodules or tumors. Flat, non-palpable skin lesions like patches and macules.
What are examples of primary lesions?
Primary lesions, which are associated with specific causes on previously unaltered skin, occur as initial reactions to the internal or external environment.
- Vesicles, bullae, and pustules are formed by fluid within skin layers.
- Nodules, tumors, papules, wheals, and plaques are palpable, elevated, solid masses.
What is the main cause of acne vulgaris?
Acne vulgaris is a skin condition that occurs when hair follicles are blocked with dead skin cells, bacteria, and oil (sebum). The blocked follicles cause blemishes on the skin, including pimples, blackheads, whiteheads, and cysts.
How is acne vulgaris diagnosed?
The diagnosis of acne is based on the history and physical examination. Lesions most commonly develop in areas with the greatest concentration of sebaceous glands, which include the face, neck, chest, upper arms, and back.
What type of skin lesion is acne?
Comedones. A comedo, or basic acne lesion, is a hair follicle that has become clogged with oil and dead skin cells. Comedones (the plural of comedo) can develop into bumps called whiteheads and blackheads.
What are acne nodules?
Nodular acne is characterized by hard, painful acne lesions deep under the skin. It often affects the face, chest, or back. Unlike regular pimples that often heal within a few days, acne nodules may last for weeks or months. They tend not to develop a white head and may remain as hard knots under the skin.
Is acne a skin lesion?
Acne vulgaris is a common chronic skin disease involving blockage and/or inflammation of pilosebaceous units (hair follicles and their accompanying sebaceous gland). Acne can present as noninflammatory lesions, inflammatory lesions, or a mixture of both, affecting mostly the face but also the back and chest.