Background: The belief in the evil eye is defined as the power to cause harm through ‘negative energy’ obtained through a glance. The practice of “medicine of the evil eye or sa mexina de s’ogu” by the “feminas e ominis de mexina” (healers) is so deeply rooted in the Sardinian culture that it influences health practices. Transcultural nursing, conceptualised by Madeleine Leininger, emphasises the importance of providing health care that takes into account patients’ cultural beliefs, practices and values. This study aims to explore, from the perspective of Madeleine Leininger’s transcultural nursing theory, the perception of the “feminas e ominis de mexina” practising “sa mexina de s’ogu”, in order to promote and raise awareness among health professionals of the importance of patients’ beliefs and cultures. Methods: A qualitative phenomenological study was conducted. Data were collected using semi-structured face-to-face interviews. The interviews were transcribed, read thoroughly, and analysed. Results: Fourteen healers were interviewed. Six main themes were extracted: (1) figure of the healer in its social context; (2) dynamics and methodology related to rituals; (3) effects of the Evil Eye; (4) ritual demand; (5) effectiveness of the ritual; and (6) comparison between the ancient and modern world. Conclusions: These findings suggest that healers act as central pillars in the connection between traditional medicine and religious practices. In response to the results obtained, it is essential to train healthcare personnel in transcultural nursing in order to provide care that is respectful and in harmony with the individual’s beliefs, promoting their comfort and well-being, and their health outcomes.