Occupation as a traditional diver has a very high risk of danger. The risk of working on a dive varies greatly depending on the type of dive being carried out. Perceived disorders include dizziness, bleeding, deafness, joint pain and excessive fatigue. The study aim to determine the relationship of knowledge with hearing loss due to diving in traditional divers in the Bugis village of Tanjung Pinang. The method used quantitative research with correlation design by means of consecutive sampling and sample size of 38 people. Data analysis using Chi Square. The results showed that there was a relationship of knowledge with hearing loss due to traditional dives with a p value of 0.046 (P <0.05), because diving activities were not equipped with knowledge about diving which had a long-term effect on the physiology of the human body such as hearing loss (Deafness) to divers. So that in the future traditional divers need to be given knowledge related to how to dive and the risks of traditional diving.Keywords: Knowledge, Divers, Hearing Loss

Background: Acne vulgaris (AV) is an inflammatory condition of pilosebaceous follicles that is commonly experienced in adolescents and young adults. The pathogenesis of AV is multifactorial, such as caused by inflammation and external factors of acne exposome, which have an impact on the pathogenesis of acne in the use of masks.Objective: To determine the effect of using a mask and the number of acne vulgaris on students of the Faculty of Medicine, Diponegoro University.Methods: This research is an observational type with a cross sectional design. The research subjects were 58 students of the Faculty of Medicine, Diponegoro University with an age range of 19-23 years who used masks. The data obtained are primary data from the questionnaire. The analytical test used is bivariate chi square analysis.Results: This study showed that there was no significant effect between the type of mask and the incidence of acne vulgaris p 0.610 (p>0.05), the duration of the use of masks and the incidence of acne vulgaris p 0.200 (p>0.05), and the frequency of using masks with the incidence of acne vulgaris p 0.689. (p>0.05)Conclusion: There is no effect between the use of masks and the incidence of acne vulgaris.