some photo of types of skin diseases

abscess - a localized collection of pus formed by necrosis of tissue

atrophy - loss of Epidermis, Dermis or both. Atrophic skin is thin, translucent and wrinkled with easily visible blood vessels

cellulitis - a purulent inflammation of the skin and subcutaneous tissue

crust - dried exudate (normally sebum, blood or pus) on the skin surface

ecchymosis - a macular red or purple haemorrhage, more than 2mm in diameter, in the skin or mucous membrane

erythema- redness of the skin due to vascular dilation

excoriation - a superficial abrasion, often linear, which is due to scratching

fissure - a linear split in the Epidermis, often just extending into the Dermis

folliculitis - an inflammation of the hair follicles
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furuncle - a pyogenic infection localised in a hair follicle

keloid - an elevated and progressive scar not showing regression

lichenification - chronic thickening of skin with increased skin markings, result of rubbing/scratching

petechia - a haemorrhagic punctate spot measuring 1-2 mm in diameter

purpura - extravasation of blood resulting in red discolouration of the skin or mucous membranes

telangiectasia - dilated dermal blood vessels giving rise to a visible lesion