They most commonly affect the scalp and rarely the beard ... Perifolliculitis capitis abscedens et suffodiens (of Hoffman), or dissecting folliculitis, is an even more severe inflammatory condition.

While IL-23 inhibitors, which include guselkumab, tildrakizumab, and risankizumab, are currently FDA-approved solely for the treatment of psoriasis, several other inflammatory skin conditions have ...