- A diagnosis of stable mild to moderate inverse psoriasis (i.e. axillae, the infra- and intermammary, genital, scrotum, abdominal and retroauricular folds; the intergluteal cleft and perianal skin, in addition to neck or other skin folds). Mild to moderate is defined as having at least score 1 for each individual sign thickness and redness, and total TSS score of at least 5.