Hailey-Hailey disease, also known as benign chronic pemphigus, is a rare autosomal dominant cutaneous disorder that usually becomes manifest in the third or fourth decade of life with erythema, vesicles, and erosions involving the body folds, particularly the groin and axillary regions. Other sites of the body, such as the neck, perianal, and submammary regions, may likewise be affected. [From OMIM]