Seborrheic DermatitisAtopic Dermatitis
Age of onset2-3months5-6months
Presence of itching/pruritusMild or absentSevere
Clinical sitesStarts at scalp (Cradle cap), neck, flexures, groins. Cheeks, extensor aspects of arms & legs, sparing the groins 
Clinical PresentationGreasy yellow coloured scaling in the above sitesMore of erythema, oozing, vesiculation.
Duration Settles by 6-12months.Persists till 2years of age or more. 70% patients remits by adolescence.

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