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A raised lesion greater than .5 cm in diameter that contains water and no pus. The plural is bullae
A plug of sebaceous and dead skin material stuck in the opening of a hair follicle. The follicle may be open (blackhead) or almost closed (whitehead).
an inanimate object that can carry a disease and infect another person. Examples of fomites are hairbrushes, towels, utensils, doorknobs, stethoscopes, or clothing.
The medical term for itching
Etiologic factors - skin lesion
Physical injury (including factitial)
A change in skin color flat with the surface. Can’t be palpated
(1 cm or less)
0.5 cm in diameter or less
Fluid-filled lesions Less than .5 cm
Blister larger than .5 cm
10-20% have hives in their lifetime
Blood plasma leaks from vessels
Allergic reactions degranulate mast cells
Circumscribed, rounded, slightly elevated
- Color: White to skin colored with red
raised broad and palpable
How to do a skin exam
Start at the top
Ask / reconfirm history of skin conditions
Examine exposed skin
Anagen: the active growth phase of hair follicles.
- Catagen: A short transition stage that occurs at the end of the anagen phase. It signals the end of the active growth of a hair. This phase lasts for about 2 to 3 weeks
- while a club hair is formed.
Telogen: The telogen phase is the resting phase of the hair follicle.
The crown bald patch eventually meeting the top points to form a horseshoe shape
- area of complete hair loss
- loss of eyebrowns and lashes
Pilar cyst - trichilemmal cyst
May be hereditary
Similar to epidermal inclusion cyst
(-) Dermatophytes tinea capitis
- common in children
- fungal infection of the scalp
- not dandruff
- overactive sebaceous glands
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