Primary and Secondary Lesions

Macula

* Primary Lesions
* >1 cm
* Measles, rash, cafe au lait spot

Papule

* Primary
* >1cm
* Moles, warts, solid

Nodule

* primary
* Elevated
* Hard
* <1cm
* Fibroma

Wheal

* Primary
* Superficial
* Raised
* Irregular
* Edema
* Mosquito bites, allergic reactions

Vesicle

* Primary
* blister
* Elevated
* Clear serum
* Varicella

Cyst

* primary
* Fluid filled
* Elevated
* Deeper tissue
* Sebaceous

Pustule

* primary
* Filled with pus
* Round
* Elevated acne

Crust

* secondary
* Dried out
* Edxudtaem vesicles, or pustules burst and dry up

Scale

* secondary
* Flake of skin
* Shredding
* Psoriasis

Fissure

* secondary
* Linear crack
* Abrupt edges
* Athletes feet, cracked lips

Erosion

* secondary
* Scooped out but hallow

Ulcer

* secondary
* Deeper depression

Excoriation

* secondary
* Self inflicted
* Scratch

Scar

* secondary
* Collagen that replaces normal tissue
* Surgical scar

Atrophic scar

* depression of skin level
* Stretch marks
* Secondary