If there are Blisters or vesicles The mnemonic is ICI(Imperial Chemical Industries) Infective, Contact dermatitis and Inflammatory including Immunological .
Inflammatory causes can include drugs but remember Immunological causes in the elderly particularly bullous pemphigoid. Contact dermatitis usually gives smaller vesicles rather than blisters but individual vesicles can join up into blisters. If blisters are linear and itchy it is probably a Plant contact dermatitis. Infective blisters are usually bullous impetigo due to a staph infection. If in a dermatomal distribution blisters are likely to be Herpes Zoster.
Vesicles on the face can be classified into Grouped or Disseminated.Grouped vesicles are Herpes simplex,Herpes zoster,Chickenpox and Contact dermatitis.Disseminated vesicles include the first 3 in rare situations such as Kaposi's varicelliform eruption where the patient has underlying atopic dermatitis.Contact dermatitis could also be more diffuse if a cream was applied over the face or a hair dye spread on to the face.
Management - Swab for viral culture or PCR examination for herpes simplex or do a Tzank smear
SIGN DIP MEN Overview of Vesicles
S-Squamous Eczema or Contact dermatitis,Vesicular Darier’s disease,Vesicular tinea,
I-Infective Herpes simplex and Zoster,Chickenpox,Vesicular tinea pedis,Hand foot and mouth disease,Molluscum,Erysipelas,
G-Granulomatous
N-Neoplastic
D-Drugs Fixed drug reaction
I-Immunological Atopic eczema,nummular eczema and allergic contact eczema, All the immunobullous diseases have a milder vesicular stage but especially Dermatitis Herpetiformis,
P-Physical Polymorphous light eruption,Hydroa vacciniforme,Scabies(children and immunosupressed),Miliaria,Caterpillar dermatitis,Insect bite reactions,
M-Metabolic Porphyria cutanea tarda,
E-Endocrine
N-Nutritional
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