“…Hailey-Hailey disease (HHD), also known as familial benign chronic pemphigus, is a rare autosomal dominant skin disorder [ 1 , 2 ]. It is caused by a mutation in the ATP2C1 gene, which encodes for intracellular calcium pumps that alter the homeostasis of this ion [ 3 , 4 , 5 ]. Excessive sweating, heat, and trauma to the skin may exacerbate HHD and cause separation of keratinocytes, especially in friction-prone areas [ 1 , 3 ].…”