Dermatitis Flashcards
presentation of discoid eczema
well defined round/oval lesions, typically on limbs
Treatment is with emollients + steroids
presentation of seborrhoeic eczema
scaly non-itchy rash that affects areas rich in sebaceous glands e.g. face, scalp, axillae
presentation of seborrhoeic eczema in infants
cradle cap- thick yellow crusts on scalp
treatment of seborrhoeic eczema
topical ketoconazole + topical steroid
cracked skin with ‘crazy paving appearance’ is suggestive of what condition?
asteatotic eczema (also known as senile eczema/eczema craquele)
- severe dryness often in winter
- usually affects lower legs + backs of hands
- elderly people
predisposing factors for asteatotic eczema
can be presenting sign of hypothyroidism
can follow commencement of diuretic/statin
treatment asteatoic eczema
emollients
avoid irritants - e.g soaps
mild steroids
pathophysiology of venous eczema
insufficient venous return from lower legs – leakage of blood vessels – haemosiderin deposits + skin stretching – inflammation
risk factors for venous eczema
chronic venous insufficiency
- age related venous valvular incompetence
- heart failure
- DVT
- varicose vein surgery
presentation of venous eczema
bilateral eczematous rash affecting lower legs
hyperpigmentation
varicose veins
lipodermatosclerosis : hard, tight skin
treatment venous eczema
emollients
compression stockings + leg elevation to improve venous return
topical steroids - moderate/potent
what type of reaction is allergic contact dermatitis
type 4 hypersensitivity
how are allergens tested for in allergic contact dermatitis
patch testing
- apply range of allergens to back
- remove after 2 days
- re-check after 4 days
common causes of allergic contact dermatitis
nickel
latex
chromate
PPD
what is irritant contact eczema
reaction to substance that can irritate anyone, often due to prolonged contact
e. g. detergens, soaps, friction
- avoid trigger
