Differential diagnosis of bullae are :
-bullous pemphigoid
-pemphigus
-herpes gestationis
-cicatricial pemphigoid
-dermatitis herpetiformis
-contact dermatitis
-bullous impetigo
-erythema multiforme
-drug eruption
-toxic epidermal necrolysis
-paraneoplasitc pemphigus
-ecthyma gangrenosum
-disseminated vibrio vulnificus
-graft versus host disease
-staphylococcal scalded skin syndrome
-epidermolysis bullosa
-porphyria cutanea tarda
-pemphigus foliaceus
-linear IgA dermatosis
-bullous pemphigoid
-pemphigus
-herpes gestationis
-cicatricial pemphigoid
-dermatitis herpetiformis
-contact dermatitis
-bullous impetigo
-erythema multiforme
-drug eruption
-toxic epidermal necrolysis
-paraneoplasitc pemphigus
-ecthyma gangrenosum
-disseminated vibrio vulnificus
-graft versus host disease
-staphylococcal scalded skin syndrome
-epidermolysis bullosa
-porphyria cutanea tarda
-pemphigus foliaceus
-linear IgA dermatosis