“…Therefore, a variety of symptoms such as facial flushing, dizziness, nausea with gastric upset, palpitation, and sweating were experienced in the betel nut chewers in our study. Notably, arecoline has been shown to devastate the oral tissues by diffusing through the oral mucosal tissues, resulting in leukoplakia, submucous fibrosis, and verrucous lesion, which are precancerous lesions with an incidence of 1-18% progression to oral cancer (Reibel, 2003;Javed et al, 2010). During the past two decades, betel nut chewing has become a serious public health problem in Taiwan.…”