Papules and Pustules | Lecture Note

University:
The University Of Western Ontario
Course:
Biology 2290F | Scientific Method in Biology
Academic year:

2022
Views:

219

Pages:

3
Author:

Kyuwon J.

Papules ● Small, solid, raised bumps in skin cited less than 0.5 cm in diameter ● type of inflammatory lesions, appears in red and pink ● does not contain visible pus ○ no visible fluid seen ● can be domed shaped, flat topped, umbilicated (small dip in the center) ● Color may vary widely ○ red, pink by inflammations ○ skin colored brown or purplish might also be seen ● Feels solid firm ○ cluster of small papules might feel rough like sandpaper ○ tender/painful by underlying inflammations ● Acene ○ inflamed comedo ■ clogged pore ■ not yet filled with pus ○ Insect bites ■ mosquito bites ■ common example of papules ○ Contact Dermatitis ■ Allergic reaction by contact with skin ■ Poison ivy, nickel ○ Warts ■ human papillomavirus ○ Molluscum Contagiosum ■ viral infection ■ small, waxy ■ umbilicated papules ○ lichin palus ■ Inflammatory condition on purplish flat topped papules Pustules ● Small circumscribed elevation on skin ○ contains visible pus ● type of inflammatory lesion ● typically raised and dome shaped , defined and distinct center ● appears white and yellowish (pus) ○ red around base (erythema) ● visible head on accumulation of pus ○ thick flid made by sead white blood cells, bacteria + cellulare debris ■ Cause our immune system fights for an infection ● painful, tneder and warm touch = active infection and inflammation happening ● acene vulgaris ● ● ● ● ○ most common cuase ○ pimples or zits Folliculitis ○ inflammation/infection on hair follicles ○ appearing on small psutules on base of hair pustular psriasis ○ less common psoriasis Rosacea ○ Skin condition with persisent redness and pustules ○ no comedones Bacterial infections ○ Impetigo ○ can present with psutules ○ rupture and form crusts How papules become pustules ● Blockage ○ hair follicles get clogged in ○ excess sebum is also present but is clogged ○ Comedo ■ white head or black head ● inflammation (papules) ○ follicle wall may rupture ○ spilling of internal contents ■ oil, dead cells ○ Immune system detects this as invasions ■ triggers inflammatory response ○ red swollen solid bump is made = papules ● Infection Response (pustules) ○ immune system sends white blood cells to site of infections ○ white blood cells attack bacteria ○ battle debris are seen as yellowish white pus on head of pustules