The mobile and internet addiction is most major problem in today’s internet era. It is most common problem facing in today’s generation. Mobile and internet addiction have emerged as prevalent concerns in contemporary society. Affecting individual of diverse demographic worldwide. The abstract present a comprehensive overview of the phenomena, exploring its manifestations, underlying causes, and potential implications on mental health, social interaction, and overall well-being. The study aims to explore the knowledge regarding mobile and internet addiction among undergraduate nursing students. The study was conducted on 60 nursing students in HGPI Institute of nursing Kala Amb, Ambala, and Haryana. Recruited using non probability sample random sampling technique. The result showed that frequency and percentage distribution of nursing students in terms of level of knowledge score on self-structured knowledge questionnaire 0.5% (3) nursing students had good, 93.3% (56) had average and 1.6% (1) had poor knowledge regarding mobile and internet addiction. The study concluded that level of knowledge and socio demographic variable. There was association of knowledge score of nursing students with selected demographic variable. The data reveled that age years (0.213309NS), Gender (0.213390NS), Religion (0.238193NS), Education of father (0.213390NS), Education of mother (0.213390NS), Occupation of father (0.238103NS), Occupation of mother (0.213309NS), and time spend on mobile and internet per day (0.213309NS) were not found statistically significant.