Doom Scrolling is Spending excessive time online surfing and reading negative or unfavorable news makes a person unhealthy. The primary objectives of the study is To assess the effectiveness of Self-instructional Module on Knowledge regarding Doom scrolling among undergraduate Nursing students. And the secondary objectives are, To assess the pre-test knowledge regarding Doom scrolling among undergraduate Nursing students. To assess the post-test knowledge regarding Doom scrolling among undergraduate Nursing students. To assess the effectiveness of Self-instructional Module on Knowledge regarding Doom scrolling among undergraduate Nursing students. Pre-Experimental one group pre-test post-test research design is used in this study and included 60 undergraduate students as a sample by using Non-Probability Convenient sampling. Assessment is done by using Self Structured Questionnaire on Demographic Variables and Structured Questionnaire on Doom Scrolling. The finding reveals that in pre test 41% students got poor score, 37% students have average and 22% students got good knowledge score while after administrating Self Instructional Module in post test 12% students have poor, 24% students got average and 64% students got good score. It is interpreted that after administrating Structure Instructional Module the knowledge regarding ‘Doomscrolling’ has been improved for undergraduate students.