Contact Dermatitis Contact dermatitis is a common diagnosis with reported prevalence rates as high as 54% for patients presenting to vulvar clinics.8 It occurs after exposure to exogenous irritants (irritant. Mar 15, · Subacute atopic dermatitis of the vulva has been described by Dr. Albert Altchek, which he said "has never been described before." Atopic dermatitis is a clinical diagnosis, according to Dr. Altchek, clinical professor of obstetrics and gynecology at Mount Sinai School of Medicine, New York. "There. Irritant contact dermatitis is the most common cause of an itchy vulva at all ages. It can be acute, relapsing or chronic. It may be due to diverse causes, including: It may be due to diverse causes, including.