Nicolsky’s sign is seen in
Nicolsky's sign
If non ulcerated gingiva are massaged, epithelium readily strips from connective tissue to tive surface, which bleeds readily. Seen in

Pemphigus
Chronic desquamative gingivitis
Haily-Haily disease
Epidermolysis bullosa
Pemphigus
Chronic desquamative gingivitis
Haily Haily disease
All of the above