Patient of Dr 

9 yrs old child presented with sore mouth and perioral blistering rash with itchy burning sensation, the rash was also in the posterior ear, axillae area popliteal fossa of the knee. She was treated with Keflex and topical Bactroban cream, but not improving. He had recent URTI 2 wks prior the rash, otherwise healthy child.

DDx:
Bullous impetigo
bullous pemphigoid
dermatitis Herpetiformis
linear IgA disease

Follow Up
skin swab for MCS and HSV PCR negative
biopsy immunofluorescene showed IgA deposition in BMZ.

So linear IgA bullous dermatosis (Chronic Bullous Disease of Childhood) was diagnosed and she was on Daposone and was improving.