Handicap in Darier's disease and Hailey-Hailey disease.

One hundred and thirty-seven patients with Darier's disease and 66 patients with Hailey-Hailey disease completed the Dermatology Life Quality Index (DLQI). The average DLQI score for Darier's disease was 5.89 (19.6% of the maximum score), median = 4, quartiles: 1.9. The average DLQI score for Hailey-Hailey disease was 6.06 (20.2% of the maximum score), median = 5, quartiles: 2.9. The DLQI score did not correlate with the physician's assessment of clinical severity in both diseases, thus emphasizing the importance of remembering the potential for handicap even in patients with disease that seems to be mild. The domains of the questionnaire with the highest mean scores in both diseases were for questions relating to symptoms and feelings. Domains relating to personal relationships and work obtained low mean scores even in severe disease. It is encouraging that most patients with Darier's disease and Hailey-Hailey disease maintain good relationships at work and home and seem to be able to adapt to their skin disease.