Health

Skin Lesions are the anomalies or findings that are not normally seen in a normal individual and indicates towards some sort of underlying disease or pathology.  Skin leasions can be found over the epidermis , dermis or mucosal surfaces anywhere in the whole body surface present in direct contact to external environment.  These lesions can be divided into three categories :- 1. Primary Skin Lesions  2. Secondary Skin Lesions 3. Special Lesions   1. PRIMARY SKIN LESIONS :-  These are the initial or non-modified lesions. These lesions can be furthur classified into –  a) Flat , Non Palpable lesions ; when size is less than 1 cm then it’s called Macule if larger then it’s a patch.  b) Circumscribed  , solid , raised lesions ; when size is less than 1 cm then it’s called Papules , when larger than 1 cm it’s reffered as plaques , if the lesion also have depth in it then it’s named as a Nodule.  c) Clear fluid filled lesion ; when size lesser than 1 cm it’s called as Vesicles and if larger then it’s called Bulla. d) Pus filled lesion ; when smaller called as Pustule , if larger and deeper then called An Abscess.  e) RBC extravasation over (Skin or Membrane). If less than 2 mm called as Petechiae , if between 2 mm to 1 cm named as Purpura , if larger then named as Echymoses .  f) Wheal ; is the term given to itchy , erythematous ,Transient evanescent plaque .  2. SECONDARY SKIN LESIONS :- When the primary lesion gets modified either by Treatment , Scratching or evolution of diseases.   a) Scale ; visible exfoliation of stratum corneum b) Crust ; Dried exudate such as Pus / Blood / Serum on skin surface   c) Erosion ; Focal or Complete loss of epidermis.  d) Ulcer ; Loss of epidermis alongside partial or total loss of dermis and Molecular Death of the involved layers.  e) Fissure ; Linear deep clefts or Cracks on the skin.  3. SPECIAL SKIN LESIONS :-  These are lesion seen only in certain kind of disease or disorders .  a) Target Lesion – seen in case of Erythema Multiforme .  b) Burrows – these are seen in individuals infected by Scabies as the parasite creates these burrows and serpigenous tunnels as their habitat over the skin.