Development of New Lesions of Hidradenitis Suppurativa on a Caesarean Section Scar: A Manifestation of the Koebner Phenomenon?

Hidradenitis suppurativa (HS) is a chronic, inflammatory, recurrent skin disorder of the hair follicle. Trauma, mechanical pressure, or friction could have an important role in the pathogenesis of HS. We present a patient with HS who developed new HS lesions shortly after a cesarean section, which could be explained by the Koebner phenomenon. Koebnerization in HS has recently been observed in patients in whom new lesions developed at an ectopic location free from apocrine glands as a result of trauma. More studies need to be conducted to shed light on the possible relation between HS and surgical trauma. Avoidance of external trauma could be included in general measures of HS treatment.