What is the primary lesion in acne?

What is the basic lesion of acne?

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 is primary skin lesion?

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.

Which of the following is a primary skin lesion?

Birthmarks: These are the most common primary skin lesions. They include moles, port-wine stains, nevi, etc. Blisters: Blisters are skin lesions that are less than half a centimeter in diameter and filled with clear fluid. Small blisters are called vesicles and larger ones are called the bullae.

What is a primary and secondary skin lesion?

Primary skin lesions are present at the onset of a disease. In contrast, secondary skin lesions result from changes over time caused by disease progression, manipulation (scratching, picking, rubbing), or treatment.

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What are the 4 types of acne?

Subtypes of acne within these two categories include:

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

What is the cause of nodular 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.

What is a primary lesion frequently seen in cases of severe acne?

Cyst (SIST) is a closed, abnormally developed sac that contains fluid, pus, semifluid, or morbid matter, above or below the skin. Cysts are frequently seen in severe acne cases.

Is urticaria a primary lesion?

Pruritus is the most common associated symptom of chronic urticaria. Lesions typically can be described as follows: Primary lesions are edematous, erythematous papules or plaques with a pale center (wheal) and surrounding erythema (flare) Lesions may be pale to red (depending on background skin color)

What are the 10 primary lesions?

Primary skin lesions:

  • Macule. A macule is a distinct discoloration of the skin that is flat and smaller than 1 centimeter in diameter. …
  • Papule. A papule is a raised skin area with no visible fluid and sized up to 1 centimeter in diameter. …
  • Nodule. …
  • Tumor. …
  • Plaque. …
  • Vesicle. …
  • Bullae. …
  • Pustule.

Is erosion a primary lesion?

Primary lesions

Epidermal collarette, scar, excoriation, erosion, ulcer, fissure, lichenification, hyperpigmentation, callus.

What are 3 types of lesions?

b. Types of Skin Lesions. Skin lesions can be divided into three categories: primary skin lesions, secondary skin lesions, and special skin lesions.

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