The condition is diagnosed on the basis of exclusion of other conditions and the typical presentation, particularly the constant presence of blood as the blister fluid.<unk>  does not cause desquamative gingivitis.
Angina bullosa haemorrhagica
Trichostasis spinulosa
Vaginitis emphysematosa
Pruritus vulvae
Callous ulcer
Genital ulcer
Anal fissure
Stercoral ulcer