Some diseases distribute this way because of the moist environment:
| • | Candida intertrigo |
| • | pemphigus vegetans |
others because this is the distribution of apocrine glands:
| • | Fox-Fordyce |
| • | hidradenitis suppurativa |
and others for unknown reasons:
| • | HSV type II |
| • | Bowen’s disease |
| • | Hailey-Hailey disease |
| • | Darier's disease |
| • | inverse pityriasis rosea |
| • | histiocytosis X |
| • | scabies |
|
*rule of thumb: intertrigo that does not respond to treatment - biopsy it (for extramammary paget's vs. histiocytosis etc...)