“…Facial skin and oral mucosa were always reported as the initial site of such a lesion (Croy, Buehrle, & Austin Szwak, 2017; Karakayali et al., 2017; Sampson, Klinkova, Vitko, & Casanas, 2018), some of which sometimes occurred only in oral‐maxillofacial system (Nitta et al., 2019). Additionally, other severe cutaneous lesions attacking oral‐maxillofacial part were also investigated, such as drug reaction with eosinophilia and systemic symptoms (Miller Quidley, Bookstaver, Gainey, & Gainey, 2012; Tian, Mohan, & Stallings, 2010), hypersensitivity syndrome (Nakamura, Watamatsu, & Muto, 2013; Papakonstantinou et al., 2018), and sweet syndrome (Kandula, Burke, & Goldfarb, 2010).…”