| Macule (Primary Lesion) | | Hives, Wheals form an extensive reaction, Pruitic |
| Patch (Primary Lesion) | | Thickening of the skin that produces tightly packed sense of papules from prolonged, intense scratching. Looks like the surface of moss or lichen |
| Papule (Primary Lesion) | | A skin lesion is repaired and normal tissue is lost and replaced with permanent connective tissue |
| Plaque (Primary Lesion) | | Palpable, has irregular borders, edematous, Mosquito Bite, superficial, raised and transient oftening lasting less then 24 hours |
| Nodule (Primary Lesion) | | Loss of Epidermis and Dermis with possible bleeding and scarring |
| Tumor (Primary Lesion) | | Greater than 1 cm in diameter, usually single chamber, superficial in epidermis and thin walled, like 1st degree burn |
| Wheal (Primary Lesion) | | Serious fluid-filled, Clear serum flows if the wall is ruptured, Cold Sore |
| Uticaria (Primary Lesion) | | Pus Filled, Acne, Turbid Fluid (puss) in cavity, Circumscribed and elevated |
| Cysts (Primary Lesion) | | Palable, circumscribed, < 0.5 cm, Elevated Nevi, Solid Raised Lesion |
| Vesicle (Primary Lesion) | | Palpable, Circumscribed, A Wart, Can be hard or soft |
| Bulla (Primary Lesion) | | Skin level is depressed with a loss of tissue, Thinning of the Epidermis |
| Pustule (Primary Lesion) | | Dried Blood, Serum or Pus Scab, Created when thick, dried out, or exudite vesicles or pustulas burst or dry out |
| Crust (Secondary Lesion) | | Lost Epidermis, Moist Surface, Non Bleeding Ruptured Vesicle |
| Scale (Secondary Lesion) | | Macule that is greater then 1cm, nonpalable |
| Erosion (Secondary Lesion) | | Encapsulated fluid filled cavity in the dermis or subcutaneous layer, tensely elevating the skin |
| Ulcer (Secondary Lesion) | | Freckles, nonpalable, less then 1cm |
| Excoriation (Secondary Lesion) | | A hypertrophic scar, Skin is elevated by excess scar tissue, looks smooth and rubbery |
| Scar (Secondary Lesion) | | Hemangionma, can be firm or soft, may be beign or malignant |
| Atrophic Scar (Secondary Lesion) | | Palpable, Scale forms with a surface elevation greater then 1cm, Psoriasis |
| Lichenification (Secondary Lesion) | | Superficial Abraision, Can be self inflicted or crusted, Such as Itchy which leads to scratching |
| Keloid (Secondary Lesion) | | Flakes of skin that exfoliate, Dandruff, second to psoriasis |
